Plugin Manifest Schema Enhancements

What: Extended plugin manifest schema with richer metadata and flexible configuration options.

Details:

• Support for homepage, repository, license, and keywords fields
• Plugin name validation enforces kebab-case (no spaces allowed)
• Author information with name, email, and URL
• Marketplace entries support categories and tags for discoverability
• Additional hooks via manifest: inline hook definitions or paths to hook files
• Additional commands/agents via manifest file references
• MCP server configurations can be specified in plugin manifests
• Semantic versioning support following semver.org specification
• Evidence: Plugin manifest schema at lines 376570-376602, hooks schema at line 376603, commands schema at line 376631