Refactor execution modes and CLI integration across agents

- Updated code-developer, tdd-developer, and test-fix-agent to streamline execution modes based on task.meta.execution_config.method.
- Removed legacy command handling and introduced CLI handoff for 'cli' execution method.
- Enhanced buildCliHandoffPrompt to include task JSON path and improved context handling.
- Updated task-generate-agent and task-generate-tdd to reflect new execution method mappings and removed command field from implementation_approach.
- Improved CLI settings validation in CliSettingsModal with format and length checks.
- Added localization for new CLI settings messages in English and Chinese.
- Enhanced GPU selector to use localized strings for GPU types.
- Introduced TypeScript LSP setup documentation for better user guidance.

ccw/frontend/src/locales/en/api-settings.json

@@ -289,6 +289,8 @@
     "descriptionPlaceholder": "Optional description for this configuration",
     "selectProvider": "Select a provider",
     "includeCoAuthoredBy": "Include co-authored-by in commits",
+    "nameFormatHint": "Letters, numbers, hyphens, underscores only. Used as: ccw cli --tool [name]",
+    "nameTooLong": "Name must be {max} characters or less",
     "validation": {
       "providerRequired": "Please select a provider",
       "authOrBaseUrlRequired": "Please enter auth token or base URL"