me-web? skeleton: Avalonia 12 app, server, packaging and CI

The first screen (online or not, a Check button, every language with a
draft notice), the desktop and Android heads, the server's /api/info and
/api/ip, a release tool that builds deb, rpm, a Windows exe, macOS zips,
a signed APK and the server, and the Gitea workflows that run it. Rules
adapted from passolo; AGPL-3.0.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

.gitignore

@@ -0,0 +1,21 @@
+bin/
+obj/
+*.user
+*.suo
+.vs/
+.idea/
+*.swp
+*.keystore
+*.jks
+*.pem
+*.p12
+appsettings.*.local.json
+/dist/
+/releases/
+/tools/bin/
+/tools/jdk/
+/tools/packaging/
+/tools/android-sdk/
+/tools/cache/
+/tools/logs/
+/.claude/settings.local.json