feat: add initial implementation of AI Workspace macOS Menu Bar App with service management functionality

apps/mac/AIWorkspace/README.md

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+# AI Workspace macOS Menu Bar App
+
+Minimal SwiftUI `MenuBarExtra` app for controlling local AI Workspace services.
+
+The app is intentionally a thin UI over the service manager. It reads live status from:
+
+```bash
+python3 scripts/aiw/services.py status --profile fidelity --json
+```
+
+and sends lifecycle actions through `scripts/aiw/services.py`.
+
+## Build
+
+```bash
+swift build --package-path apps/mac/AIWorkspace
+```
+
+## Run during development
+
+```bash
+swift run --package-path apps/mac/AIWorkspace AIWorkspace
+```
+
+## Current actions
+
+- Refresh status
+- Start Fidelity services
+- Stop Fidelity services
+- Restart Context MCP
+- Open Mattermost through the service manager
+- Run Doctor
+- Copy Doctor JSON
+- Copy Photo Inbox URL
+- Open MCP Health
+- Open logs folder
+- Open project knowledge
+
+## Notes
+
+- This is not yet packaged as a signed `.app` bundle.
+- Start at login should be implemented later through a LaunchAgent or app login item.
+- The app should remain a UI layer; service lifecycle remains in `scripts/aiw/services.py`.