Project market defaults and Keyword Research keyboard controls.

## What's new

- Set each project's default country and language — thanks @bookingseo
  - Keyword Research, Domain Overview, new Rank Tracking setups, and supported MCP tools inherit these defaults.
- Press Enter to run a Keyword Research search
  - Use Shift+Enter or paste lines to research multiple keywords.

Full Changelog: https://github.com/every-app/open-seo/compare/v0.0.27...v0.0.28