feat: add keyboard shortcut for prompt enhancement

[roomote]

This PR adds a keyboard shortcut (Ctrl+Shift+E / Cmd+Shift+E on Mac) to trigger the prompt enhancement feature, improving the user experience by eliminating the need to manually click the enhance prompt button.

Changes Made:

• Added new VS Code command roo-cline.enhancePrompt with keyboard shortcut binding
• Registered the command in the extension activation
• Connected the command to trigger the enhance prompt functionality via webview messaging
• Updated the enhance prompt button tooltip to display the keyboard shortcut
• Added triggerEnhancePrompt action to ExtensionMessage type for proper TypeScript support

Testing:

• TypeScript compilation passes for both extension and webview
• ESLint checks pass with no warnings
• The keyboard shortcut can be tested by:
  1. Opening the Roo Code sidebar
  2. Typing some text in the prompt area
  3. Pressing Ctrl+Shift+E (or Cmd+Shift+E on Mac)
  4. The prompt enhancement should trigger just like clicking the wand button

This is a quality-of-life improvement that makes the prompt enhancement feature more accessible and efficient for power users.

---

Important

Adds Ctrl+Shift+E (or Cmd+Shift+E on Mac) shortcut for prompt enhancement, updating command registration, UI, and TypeScript support.

• Behavior:
  • Adds roo-cline.enhancePrompt command with Ctrl+Shift+E (or Cmd+Shift+E on Mac) shortcut in src/package.json.
  • Registers command in registerCommands.ts to trigger enhancePrompt via webview messaging.
  • Updates tooltip in ChatTextArea.tsx to show shortcut.
• TypeScript:
  • Adds triggerEnhancePrompt action to ExtensionMessage in ExtensionMessage.ts and WebviewMessage.ts.
• UI:
  • Implements triggerEnhancePrompt in ChatView.tsx to simulate button click.
  • Updates App.tsx to handle triggerEnhancePrompt message.
• Testing:
  • Confirms TypeScript compilation and ESLint checks pass.
  • Manual testing steps provided for shortcut functionality.

^{This description was created by for a563f91. You can customize this summary. It will automatically update as commits are pushed.}

[ellipsis-dev]

Instead of using document.querySelector('[aria-label*="enhance"]') to find the enhance prompt button, consider passing a ref from the ChatTextArea component. This will improve reliability and maintainability.