Add a preferred language dropdown

[mrubens]

---

Important

Adds a preferred language dropdown to settings, updating state management and system prompts to support language selection.

• Behavior:
  • Adds a preferred language dropdown in SettingsView.tsx for selecting communication language.
  • Updates Cline.ts and ClineProvider.ts to include preferredLanguage in system prompts and state management.
• State Management:
  • Adds preferredLanguage to ExtensionState in ExtensionMessage.ts and ExtensionStateContext.tsx.
  • Updates ClineProvider.ts to handle preferredLanguage in global state and webview messages.
• Tests:
  • Adds tests in ClineProvider.test.ts to verify default language settings and state updates.
• Misc:
  • Updates README.md to document language selection feature.

^{This description was created by for 8b4c52f. It will automatically update as commits are pushed.}

[changeset-bot]

🦋 Changeset detected

Latest commit: 8b4c52f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
roo-cline	Patch

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