Add Playwright-based scraping and login scripts for STATdx

- Implemented `statdx_play_chrome.py` to launch Chrome via Playwright, allowing for headful browsing and capturing XHR requests.
- Created `statdx_playwright.py` for headless scraping of the STATdx application, including automatic login and HTML saving.
- Developed `statdx_requests.py` for form-based login and scraping, providing a fallback for sites using traditional authentication.
- Added example HTML output from Playwright scraping to `topics_playwright.html`.
- Captured XHR request data in JSON format for analysis in `xhr_captured/app.statdx.com_csrf_token_8000d0ed_20251014T124122Z.json`.

.gitignore

@@ -0,0 +1,70 @@
+# Python cache and bytecode
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Virtual environments
+env/
+venv/
+.venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Distribution / packaging
+build/
+dist/
+*.egg-info/
+.eggs/
+pip-wheel-metadata/
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Test, coverage, caches
+.pytest_cache/
+.coverage
+.coverage.*
+.cache/
+nosetests.xml
+coverage.xml
+.hypothesis/
+
+# IDEs and editors
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs and databases
+*.log
+*.sqlite3
+*.db
+
+# Environment/secrets
+.env
+.env.*
+secrets.json
+
+# Compiled extensions
+*.so
+*.dylib
+*.dll
+
+# Jupyter
+.ipynb_checkpoints/
+
+# Misc
+*.egg
+*.egg-info
+*.dist-info
+
+.chrome_profile
+.playwright_profile
+
+captured/