Adds Tor Browser as a Fleet-maintained app for macOS only.
## Changes
- **macOS**: Homebrew cask `tor-browser`, DMG installer, bundle
identifier `org.torproject.torbrowser`
- Icon sourced from the official Tor Project GitHub at 128x128
- Added to `apps.json` catalog in alphabetical order
**Note:** Windows support was dropped. Tor Browser for Windows uses a
portable installer that installs to `%LOCALAPPDATA%` (not `C:\Program
Files`), which is outside the scope of what Fleet's CI validator and
Windows install validation can detect. macOS-only is the correct scope
for this app.
## Test plan
- [ ] Verify `go run cmd/maintained-apps/main.go
--slug="tor-browser/darwin"` produces valid output
- [ ] Confirm icon renders correctly in the software catalog UI
- [ ] Confirm macOS install/uninstall scripts work on a test device
Mitch Francese
bb091361d9
