* [docs]feat: add browser extension documentation for PR #89
Add comprehensive documentation for the Chrome Extension Bridge feature:
- New guides/browser-extension.mdx with setup, usage, security, and
troubleshooting sections
- docs.json navigation updated with new page entry
- index.mdx gains Integration Options card section (CLI/Extension/MCP)
- installation.mdx table and links include extension method
- cli-and-skills.mdx adds extension mode tip after browser examples
- api-reference/cli.mdx adds extension subcommands and --extension
global flag documentation
* [docs]fix: update extension docs to reflect GitHub Release install flow
Sync documentation with PR #93 changes: extension is now downloaded
from GitHub Releases instead of extracted from embedded CLI binary.
AlexZ