Summary

• Extended DeepLinkAction enum with 6 new actions: PauseRecording, ResumeRecording, TogglePauseRecording, SetCamera, SetMicrophone, TakeScreenshot
• Created full Raycast extension with 10 commands for controlling Cap from the launcher
• Refactored resolve_capture_target into shared helper to reduce duplication

Fixes #1540

Test plan

• Test all new deeplink actions via cap-desktop://action?value=<json>
• Verify Raycast extension installs and all commands work
• Verify existing deeplink actions still work correctly /claim #1540