MacOS entitlements

[bdlukaa]

• fix(macos): MacOS entitlements for App Store version;
• fix(macos): Remove media_kit binaries
  This reduced the app size by 33%: ~151 MB to ~101 MB.
• fix(macos): Crash when disposing multiple players
  This fix was only applied to Linux, but now it is necessary on macOS as well. This is now the default for all platforms that use MDK as default, except the web.
• fix: Correctly dismiss top bar in immersive mode;
• fix: Only save layouts if layout manager height is not null
• fix: Do not throw error on stream error
• chore: Update README with recent installing instructions;
• chore: Remove macos build workflow.
  macOS is now only available through the app store.