feat: contact route with reCAPTCHA validation and email ...

- Added ContactCreate schema with recaptcha_token
- Implemented submit_contact endpoint with reCAPTCHA verification
- Created contact.html template with form
- Updated main.py to include contact router
- Fixed database.py to use get_settings() properly
- All route tests passing (home, about, projects, contact)

feat: initial project setup with config and dependencies