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/pubspec.yaml

@@ -0,0 +1,45 @@
+name: halkyon_ui
+description: "Halkyon's look, shared by its apps: the theme around cobalt and copper, the bundled Noto Sans, window sizes, and the widgets every app's screens are built of."
+version: 0.1.0
+publish_to: none
+resolution: workspace
+
+environment:
+  sdk: ^3.13.0
+  flutter: ^3.44.4
+
+dependencies:
+  # Material 3 Expressive's loading indicator, which Flutter doesn't ship yet
+  # (AppLoadingIndicator).
+  expressive_loading_indicator: ^0.0.1
+  flutter:
+    sdk: flutter
+  # gen-l10n's output imports it; apps take Material's texts from material_ui.
+  flutter_localizations:
+    sdk: flutter
+  intl: ^0.20.3
+  lucide_icons_flutter: ^3.1.20
+  material_ui: ^1.5.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+flutter:
+  # Generates HalkyonUiLocalizations from lib/l10n (see l10n.yaml).
+  generate: true
+
+  assets:
+    # Noto Sans's licence, for the licence list (registerFontLicenses).
+    - assets/fonts/OFL-NotoSans.txt
+
+  # Noto Sans for Latin, Greek (polytonic too) and Cyrillic, the same on every
+  # device and never fetched; each file holds every weight (variable fonts). An
+  # app reaches it as `packages/halkyon_ui/Noto Sans` (appFontFamily). The CJK
+  # fonts behind it are the apps' own to bundle (appFontFallback).
+  fonts:
+    - family: Noto Sans
+      fonts:
+        - asset: assets/fonts/NotoSans-Variable.ttf
+        - asset: assets/fonts/NotoSans-Italic-Variable.ttf
+          style: italic