test(e2e): add venv + playwright deps and robust Matomo API auth flow

- Add optional dependency group "e2e" with Playwright in pyproject.toml
- Teach Makefile to create/use local .venv, install e2e deps, and fetch Chromium
- Wait for Matomo HTTP response (any status) before running bootstrap
- Switch API calls to /index.php and add HttpClient.get()
- Use UsersManager.getTokenAuth (md5Password) to obtain token_auth for privileged calls
- Make web installer more resilient to HTTPError/500 and locale/button variations
- Update E2E test to pass admin email and call API via /index.php

https://chatgpt.com/share/694a70b0-e520-800f-a3e4-eaf5e96530bd

src/matomo_bootstrap.egg-info/PKG-INFO

@@ -0,0 +1,20 @@
+Metadata-Version: 2.4
+Name: matomo-bootstrap
+Version: 0.1.0
+Summary: Headless bootstrap tooling for Matomo (installation + API token provisioning)
+Author-email: Kevin Veen-Birkenbach <kevin@veen.world>
+License: All rights reserved by Kevin Veen-Birkenbach
+Project-URL: Homepage, https://github.com/kevinveenbirkenbach/matomo-bootstrap
+Requires-Python: >=3.10
+Description-Content-Type: text/markdown
+License-File: LICENSE
+Provides-Extra: e2e
+Requires-Dist: playwright>=1.40.0; extra == "e2e"
+Dynamic: license-file
+
+# matomo-bootstrap
+
+Homepage: https://github.com/kevinveenbirkenbach/matomo-bootstrap
+
+## Author
+Kevin Veen-Birkenbach <kevin@veen.world>