feat: Add WSL support for Cursor CLI on Windows

- Add reusable WSL utilities in @automaker/platform (wsl.ts):
  - isWslAvailable() - Check if WSL is available on Windows
  - findCliInWsl() - Find CLI tools in WSL, tries multiple distributions
  - execInWsl() - Execute commands in WSL
  - createWslCommand() - Create spawn-compatible command/args for WSL
  - windowsToWslPath/wslToWindowsPath - Path conversion utilities
  - getWslDistributions() - List available WSL distributions

- Update CursorProvider to use WSL on Windows:
  - Detect cursor-agent in WSL distributions (prioritizes Ubuntu)
  - Use full path to wsl.exe for spawn() compatibility
  - Pass --cd flag for working directory inside WSL
  - Store and use WSL distribution for all commands
  - Show "(WSL:Ubuntu) /path" in installation status

- Add 'wsl' to InstallationStatus.method type

- Fix bugs:
  - Fix ternary in settings-view.tsx that always returned 'claude'
  - Fix findIndex -1 handling in WSL command construction
  - Remove 'gpt-5.2' from unknown models test (now valid Cursor model)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

libs/types/src/provider.ts

@@ -81,7 +81,15 @@ export interface InstallationStatus {
   installed: boolean;
   path?: string;
   version?: string;
-  method?: 'cli' | 'npm' | 'brew' | 'sdk';
+  /**
+   * How the provider was installed/detected
+   * - cli: Direct CLI binary
+   * - wsl: CLI accessed via Windows Subsystem for Linux
+   * - npm: Installed via npm
+   * - brew: Installed via Homebrew
+   * - sdk: Using SDK library
+   */
+  method?: 'cli' | 'wsl' | 'npm' | 'brew' | 'sdk';
   hasApiKey?: boolean;
   authenticated?: boolean;
   error?: string;