Halkyon's shared packages

A pub workspace of the Dart packages Halkyon's apps share: halkyon_ui,
Halkyon's look (the theme, fonts, layout and shared widgets, with texts
in English and German), halkyon_core's low-level primitives and
halkyon_interop's cross-app contracts. Dart 3.13 with LeanCode's lints,
configured once at the root; apps take a package by git, pinned to a
signed commit.

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

packages/halkyon_ui/example/pubspec.yaml

@@ -0,0 +1,18 @@
+name: halkyon_ui_example
+description: "An app built on halkyon_ui, as Halkyon's apps are: shows how one sets it up, and checks what only an app can see (the package's font by the name an app finds it under, its licence)."
+publish_to: none
+resolution: workspace
+
+environment:
+  sdk: ^3.13.0
+  flutter: ^3.44.4
+
+dependencies:
+  flutter:
+    sdk: flutter
+  halkyon_ui: ^0.1.0
+  material_ui: ^1.5.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter