refactor!: packages, paths and app IDs under Halkyon Days' names (ADR 0045, step 3)

Learn's folder is apps/halkyon, Todo's apps/myrmex; every package of
ours takes the prefix halkyone_ (halkyone_halkyon_*, halkyone_myrmex_*,
halkyone_train_*, halkyone_meditate_*, halkyone_app, halkyone_base_* and
the other shared ones; halkyon_oidc_* keeps its name, D11). Halkyon and
Myrmex take the app IDs one.halky.halkyon and one.halky.myrmex (D10);
Train and Meditate keep theirs, while every app's Android namespace,
Kotlin package and method channels move to one.halky. The snaps are
halkyon and myrmex (D17), each built in a clone with its recipe in
place of snap/, as Train's and Todo's were.

Serverpod finds a database's migrations by its module's name, which
changed with the packages':
- each server's new, empty migration ("rename") records itself under
  the new names and deletes the rows under the old ones;
- deploy/redeploy.sh copies each database's record to the new name
  before the migrations (carry_module), so the renamed servers find
  their databases migrated; a copy, never a move, so a deploy failing
  before the migration commits leaves the old rows in place;
- Train and Meditate keep their devices' databases: halkyone_app's
  carryMigrationRecord copies their record before the sync engine
  opens them (openPersonDatabase);
- the client migrations' generated moduleName getters, one line each,
  say the new names: Serverpod's client asserts in debug builds that
  every migration names the module, and create-migration never writes
  a migration's files again.

Train's WorkManager work is enqueued under new names, the former ones
cancelled: the work kept names the workers' former classes.

The release tool: an app's tags of its earlier names count as its
history (legacyTagPrefixes), the shared packages' former paths count
for its version, and every snap is built in a clone (atRoot gone).

The databases, Docker images and Compose project keep their names
until step 5.

BREAKING CHANGE: Halkyon (Learn) and Myrmex (Todo) are new apps to
Android and the Snap Store: installs of app.halkyon.learn and
app.halkyon.todo don't update to them.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

apps/todo/halkyon_todo_flutter/linux/CMakeLists.txt

@@ -1,128 +0,0 @@
-# Project-level configuration.
-cmake_minimum_required(VERSION 3.13)
-project(runner LANGUAGES CXX)
-
-# The name of the executable created for the application. Change this to change
-# the on-disk name of your application.
-set(BINARY_NAME "halkyon_todo_flutter")
-# The unique GTK application identifier for this application. See:
-# https://wiki.gnome.org/HowDoI/ChooseApplicationID
-set(APPLICATION_ID "app.halkyon.todo")
-
-# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
-# versions of CMake.
-cmake_policy(SET CMP0063 NEW)
-
-# Load bundled libraries from the lib/ directory relative to the binary.
-set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
-
-# Root filesystem for cross-building.
-if(FLUTTER_TARGET_PLATFORM_SYSROOT)
-  set(CMAKE_SYSROOT ${FLUTTER_TARGET_PLATFORM_SYSROOT})
-  set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
-  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
-  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
-  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
-  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
-endif()
-
-# Define build configuration options.
-if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
-  set(CMAKE_BUILD_TYPE "Debug" CACHE
-    STRING "Flutter build mode" FORCE)
-  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
-    "Debug" "Profile" "Release")
-endif()
-
-# Compilation settings that should be applied to most targets.
-#
-# Be cautious about adding new options here, as plugins use this function by
-# default. In most cases, you should add new options to specific targets instead
-# of modifying this function.
-function(APPLY_STANDARD_SETTINGS TARGET)
-  target_compile_features(${TARGET} PUBLIC cxx_std_14)
-  target_compile_options(${TARGET} PRIVATE -Wall -Werror)
-  target_compile_options(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:-O3>")
-  target_compile_definitions(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:NDEBUG>")
-endfunction()
-
-# Flutter library and tool build rules.
-set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
-add_subdirectory(${FLUTTER_MANAGED_DIR})
-
-# System-level dependencies.
-find_package(PkgConfig REQUIRED)
-pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
-
-# Application build; see runner/CMakeLists.txt.
-add_subdirectory("runner")
-
-# Run the Flutter tool portions of the build. This must not be removed.
-add_dependencies(${BINARY_NAME} flutter_assemble)
-
-# Only the install-generated bundle's copy of the executable will launch
-# correctly, since the resources must in the right relative locations. To avoid
-# people trying to run the unbundled copy, put it in a subdirectory instead of
-# the default top-level location.
-set_target_properties(${BINARY_NAME}
-  PROPERTIES
-  RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/intermediates_do_not_run"
-)
-
-
-# Generated plugin build rules, which manage building the plugins and adding
-# them to the application.
-include(flutter/generated_plugins.cmake)
-
-
-# === Installation ===
-# By default, "installing" just makes a relocatable bundle in the build
-# directory.
-set(BUILD_BUNDLE_DIR "${PROJECT_BINARY_DIR}/bundle")
-if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
-  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
-endif()
-
-# Start with a clean build bundle directory every time.
-install(CODE "
-  file(REMOVE_RECURSE \"${BUILD_BUNDLE_DIR}/\")
-  " COMPONENT Runtime)
-
-set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
-set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib")
-
-install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
-  COMPONENT Runtime)
-
-install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
-  COMPONENT Runtime)
-
-install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
-  COMPONENT Runtime)
-
-foreach(bundled_library ${PLUGIN_BUNDLED_LIBRARIES})
-  install(FILES "${bundled_library}"
-    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
-    COMPONENT Runtime)
-endforeach(bundled_library)
-
-# Copy the native assets provided by the build.dart from all packages.
-set(NATIVE_ASSETS_DIR "${PROJECT_BUILD_DIR}native_assets/linux/")
-install(DIRECTORY "${NATIVE_ASSETS_DIR}"
-   DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
-   COMPONENT Runtime)
-
-# Fully re-copy the assets directory on each build to avoid having stale files
-# from a previous install.
-set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
-install(CODE "
-  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
-  " COMPONENT Runtime)
-install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
-  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
-
-# Install the AOT library on non-Debug builds only.
-if(NOT CMAKE_BUILD_TYPE MATCHES "Debug")
-  install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
-    COMPONENT Runtime)
-endif()