feat(conpty): integrate bundled ConPTY support and verification (#488)

- Added scripts to prepare and verify the Microsoft ConPTY package for Windows.
- Updated build workflows to include checks for bundled ConPTY in installers.
- Enhanced application support info to display ConPTY status and version.
- Modified the portable updater to handle ConPTY files during updates.
- Updated documentation to reflect changes in ConPTY usage and requirements.
- Introduced tests for ConPTY backend functionality to ensure reliability.

package.json

@@ -20,6 +20,7 @@
     "dev": "vite",
     "build": "pnpm build:mcp-sidecar && tsc && vite build",
     "build:mcp-sidecar": "node scripts/build-mcp-sidecar.mjs",
+    "prepare:conpty": "node scripts/prepare-conpty.mjs",
     "release": "node scripts/sync-version.mjs --commit && tauri build",
     "build:unlock-rescue": "powershell -ExecutionPolicy Bypass -File scripts/build-unlock-rescue.ps1",
     "preview": "vite preview",