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/lib/l10n/halkyon_ui_en.arb

@@ -0,0 +1,42 @@
+{
+  "@@locale": "en",
+
+  "brand": "Halkyon",
+  "@brand": {
+    "description": "The brand's word, above an app's own in its wordmark (\"Halkyon\" over \"Learn\")."
+  },
+  "close": "Close",
+  "cancel": "Cancel",
+  "undo": "Undo",
+  "dragToReorder": "Drag to reorder",
+  "reorder": "Reorder",
+  "reorderDone": "Done",
+  "requiredField": "Required",
+  "@requiredField": {
+    "description": "Below a required field while it is empty."
+  },
+  "decrease": "Decrease",
+  "increase": "Increase",
+  "typeANumber": "Type a number",
+  "gone": "This no longer exists. It may have been deleted on another device.",
+  "moreInfo": "More info",
+  "copiedToClipboard": "Copied to clipboard",
+  "copy": "Copy",
+  "paletteColorName": "{name, select, carrot{Carrot} cerise{Cerise} cobalt{Cobalt} copper{Copper} enzian{Enzian} fern{Fern} forest{Forest} ocean{Ocean} olive{Olive} pacific{Pacific} pickle{Pickle} pine{Pine} pink{Pink} plum{Plum} purple{Purple} reef{Reef} sahara{Sahara} slateblue{Slate blue} soil{Soil} strawberry{Strawberry} other{{name}}}",
+  "@paletteColorName": {
+    "description": "A colour of the palette content can take, by its stored name.",
+    "placeholders": {
+      "name": {
+        "type": "String"
+      }
+    }
+  },
+  "colorPickerLabel": "Colour: {color}",
+  "@colorPickerLabel": {
+    "placeholders": {
+      "color": {
+        "type": "String"
+      }
+    }
+  }
+}