Move marketplace types to @roo-code/types

[jr]

And do some cleanup & consolidation.

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Important

Move marketplace types to @roo-code/types and update imports and tests accordingly.

• Marketplace Types:
  • Move marketplace types to @roo-code/types.
  • Update imports in MarketplaceManager.ts, RemoteConfigLoader.ts, SimpleInstaller.ts, and 8 other files.
• Schema and Types:
  • Add marketplace.ts with schemas and types for marketplace items.
  • Remove types.ts and schemas.ts from src/services/marketplace.
• Tests:
  • Update tests in MarketplaceManager.test.ts, RemoteConfigLoader.test.ts, SimpleInstaller.test.ts, and 8 other test files to use new imports.
  • Ensure tests handle new type locations and schema validations.

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