Bootstrap Pilgrims of Katan: rebrand, Gitea CI and OTA

Import of ProLibertateGames (upstream main, GPL-3.0) rebranded for
Wallacenet and repointed at git.wallacenet.ca.

- Identity: applicationId ca.wallacenet.pilgrimsofkatan (+ .dev for the dev
  channel), launcher names "Pilgrims of Katan" / "Pilgrims of Katan DEV",
  neutral hexagon branding replacing the Wallace tartan. Uncial Antiqua keeps
  its OFL licence, and the GPL-3.0 LICENSE plus upstream attribution stay.
- OTA: Updater.kt now reads this repo's own Gitea releases
  (/api/v1/repos/devadmin/PilgrimsOfKatan/releases...) and BuildConfig.
  OTA_ENABLED is on; Gitea answers the same JSON shape the code already parsed.
- Build numbers: versionCode = CI run number + plgVersionRunOffset (1000),
  with the tag and versionName derived from the same figure. The offset is
  permanent, because Gitea Actions restarts run numbers at 1 and a reset would
  otherwise make Android reject the next build as a downgrade.
- CI: ci.yml publishes a dev prerelease from dev, release.yml a production
  release from main, both through scripts/publish-release.sh (Gitea REST API,
  runnable by hand until an Actions runner is registered).
- Docs: docs/CI.md records the channel, numbering and runner decisions;
  docs/README.md seeds the per-game RULES-* conventions; CLAUDE.md carries the
  agent ground rules.

Verified: ./gradlew assembleDebug and testDebugUnitTest green on JDK 17 /
compileSdk 34, both variants stamped, installing side by side under the new
identity.

Co-Authored-By: Paperclip <[email protected]>

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -1,15 +1,23 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  Deliberately empty. The icon is the cloth itself, so the adaptive icon's
-  foreground layer carries nothing — anything drawn here would sit on top of the
-  tartan and break the "single square of tartan" idea.
+  The brand emblem: a hexagonal ring around a solid hexagonal core, in
+  parchment on the brand field behind it (see ic_launcher_background).
+
+  The hexagon is a game tile, not any game's mark — deliberately generic
+  branding for Pilgrims of Katan, carrying no third-party logo or trade dress.
+  Everything sits inside the adaptive icon's safe zone (a centred 66dp circle
+  on this 108dp canvas) so no launcher mask can clip it.
 -->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="108dp"
     android:height="108dp"
     android:viewportWidth="108"
     android:viewportHeight="108">
+    <!-- Ring and core in one even-odd path: outer hexagon, inner hexagon,
+         core hexagon — odd coverage fills, so the ring and the core are drawn
+         and the gap between them stays open to the field showing through. -->
     <path
-        android:fillColor="#00000000"
-        android:pathData="M0,0h108v108h-108z" />
+        android:fillColor="@color/brand_accent"
+        android:fillType="evenOdd"
+        android:pathData="M84,54 L69,79.98 L39,79.98 L24,54 L39,28.02 L69,28.02 Z M72,54 L63,69.59 L45,69.59 L36,54 L45,38.41 L63,38.41 Z M63,54 L58.5,61.79 L49.5,61.79 L45,54 L49.5,46.21 L58.5,46.21 Z" />
 </vector>