feat: add support for Codex's request_user_input tool

Implement full support for the request_user_input tool with both Web UI and CLI
components. This includes:

- New view and footer components for request_user_input tool UI
- Tool registration in knownTools and view registries
- Nested answer format support (Record<string, { answers: string[] }>)
- Backward compatibility with flat answer format (Record<string, string[]>)
- Permission handler updates for CLI request_user_input acceptance
- Type definitions and schema updates across shared/cli/server/web packages
- Translation strings for request_user_input UI elements
- Conditional footer rendering in ToolCard for question tools

web/src/lib/locales/en.ts

@@ -184,6 +184,9 @@ export default {
   'tool.askUserQuestion.fallback': 'AskUserQuestion payload is not in the expected format. Type your answer:',
   'tool.askUserQuestion.placeholder': 'Type your answer…',
   'tool.askUserQuestion.otherPlaceholder': 'Or type your own answer…',
+  'tool.requestUserInput.textPlaceholder': 'Type your answer…',
+  'tool.requestUserInput.noteLabel': 'Additional note (optional)',
+  'tool.requestUserInput.notePlaceholder': 'Add a note…',
 
   // Composer buttons
   'composer.settings': 'Settings',