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>

.gitignore

@@ -0,0 +1,28 @@
+node_modules
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+pnpm-debug.log*
+
+# Local credentials - .env.test.local is matched by the *.local pattern below
+# and must never be committed. Copy .env.test.example to create it.
+*.local
+*.pem
+
+# Editor directories and files
+.vscode
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.sw?
+
+# Test artifacts
+allure-results/
+allure-report/
+playwright-report/
+test-results/
+downloads/