build(release): several apps released in one run (train:minor learn), their version commits pushed without the checks

The release tool and tool/with_signing_keys.sh take several apps, each with its version
after a colon or none, and release them one after another, each as alone, stopping at
the first that fails; the key script fetches every named app's key.

The pre-push hook skips tool/check.dart when a push brings release commits alone: the
release tool's chore(release) subject, an app's pubspec changed in its version line and
its texts of what's new, nothing else (tool/release_push.dart). Signatures are checked as
before, and CI still runs the checks. A release no longer costs a run of the checks.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

test/release/signing_keys_test.dart

@@ -64,13 +64,29 @@ void main() {
 
   test("fdroid runs the F-Droid repository's script alone, with the "
       "index's key and its password only", () {
-    expect(script, contains('  fdroid) ;;'));
     expect(script, contains(r'tool/fdroid_repo.sh "$@" || status=$?'));
     final alone = script.substring(
-      script.indexOf(r'if [ "$app" = fdroid ]; then'),
+      script.indexOf(r'if [ "$1" = fdroid ]; then'),
       script.indexOf(r'tool/fdroid_repo.sh "$@"'),
     );
     expect(alone, isNot(contains('app_item')));
     expect(alone, isNot(contains('forgejo_token')));
   });
+
+  test('several apps named, each gets its own key, under its own name and '
+      'variable, and the release tool every argument as given', () {
+    expect(script, contains(r'*) apps+=("${word%%:*}") ;;'));
+    expect(script, contains('-* | major | minor | patch) ;;'));
+    expect(
+      script,
+      contains(
+        r'fetch "$app_item" android-release.p12 "$keys/$app-android-release.p12"',
+      ),
+    );
+    expect(
+      script,
+      contains(r'export "$app_variable=$keys/$app-android-release.p12"'),
+    );
+    expect(script, contains(r'dart run tool/release.dart "$@" || status=$?'));
+  });
 }