- Re-add country (gl), location, and locale (hl) parameters to SerperDevTool class
- Update payload construction in _make_api_request to include localization params
- Add schema validation for localization parameters
- Update documentation and examples to demonstrate parameter usage
These parameters were accidentally removed in the previous enhancement PR and are crucial for:
- Getting region-specific search results (via country/gl)
- Targeting searches to specific cities (via location)
- Getting results in specific languages (via locale/hl)
BREAKING CHANGE: None - This restores previously available functionality