Workshop Wallpaper Bridge v0.2.0

Adds desktop-aware playback and user-facing setup docs.\n\nChanges:\n- Added Auto-pause behind apps: playback pauses/hides while other apps cover the desktop and resumes when the desktop is visible.\n- Keeps wallpaper playback alive when the control window is minimized or hidden.\n- Added sleep/wake and monitor-change recovery.\n- Added safe still wallpaper setting from thumbnails/images for desktop and possible Lock Screen mirroring.\n- Improved app UI with clearer import/play steps, auto-pause toggle, status text, and Lock Screen guidance.\n- Rewrote English and Korean README files for end users.\n\nNotes:\n- Animated Lock Screen wallpapers are not implemented because macOS does not expose a stable public third-party API for that; this release uses public still-wallpaper APIs only.\n- This remains local-only: no Workshop downloader, Steam auth bypass, DRM bypass, scene.pkg unpacking, or redistribution flow.\n\nSHA256:\n- WorkshopWallpaperBridge-macOS-arm64.zip: 338a241c5bb184e102e52bc35f01738135a180fc75e508cf256b7d763f415007