chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

web_src/js/webcomponents/polyfill.test.ts

@@ -0,0 +1,7 @@
+import {weakRefClass} from './polyfills.ts';
+
+test('polyfillWeakRef', () => {
+  const WeakRef = weakRefClass();
+  const r = new WeakRef(123);
+  expect(r.deref()).toEqual(123);
+});