Extract PassDashboard Playwright e2e suite into standalone repo

Copies the Playwright end-to-end suite out of the PassDashboard app repo so
it can be run and deployed independently. Nothing was removed from the app
repo - this is a copy.

Carried over verbatim: tests/ (10 spec files, 4 helper modules, README) plus
playwright.config.ts and .env.test.example. The suite drives the deployed app
over HTTP and imports nothing from src/, which is what makes it standalone.

New for this repo:
- package.json with only the deps the suite actually uses (@playwright/test,
  allure-playwright, xlsx, typescript, @types/node) and the e2e scripts.
- tsconfig.json covering tests/ - the app repo's tsconfig.app.json only
  included src/, so these files were never typechecked before.
- .gitea/workflows/e2e-tests.yml for Gitea Actions. The app repo derived ENV
  from github.ref_name; that doesn't apply here since this repo has no
  per-environment branches, so the target is an explicit workflow_dispatch
  input and scheduled/push runs default to develop. Reports are uploaded as
  artifacts rather than deleted.
- .gitignore and README covering local setup and the required CI secrets.

The Jest unit tests under src/__tests__/ were deliberately left in the app
repo: they import application source directly (AuthContext, ProtectedRoute,
cryptoUtils, api) and cannot run without it.

Verified: npx tsc --noEmit is clean and playwright collects all 43 tests
across all 10 spec files.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tsconfig.json

@@ -0,0 +1,27 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "lib": ["ES2023", "DOM"],
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "types": ["node", "@playwright/test"],
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "isolatedModules": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    // The app repo's tsconfig.app.json only included `src`, so tests/ was
+    // never typechecked there. Turning these on surfaces four pre-existing
+    // unused locals in the specs (management/refunds/terminals) that are not
+    // worth touching as part of the extraction - left off so `npm run
+    // typecheck` stays a useful signal for real type errors.
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["tests", "playwright.config.ts"]
+}