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

.gitea/scripts/android.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+set -e
+if [ -z "$MEWEB_KEYSTORE_B64" ] || [ -z "$MEWEB_KEYSTORE_PASS" ]; then
+  echo "::error::the repository secrets MEWEB_KEYSTORE_B64 and MEWEB_KEYSTORE_PASS are not set"
+  exit 1
+fi
+MEWEB_KEYSTORE="${RUNNER_TEMP:-/tmp}/meweb-$$.keystore"
+export MEWEB_KEYSTORE MEWEB_KEYSTORE_PASS
+trap 'rm -f "$MEWEB_KEYSTORE"' EXIT
+umask 077
+printf '%s' "$MEWEB_KEYSTORE_B64" | base64 -d > "$MEWEB_KEYSTORE"
+unset MEWEB_KEYSTORE_B64
+tools/release.sh android --commit "$COMMIT"