Add native arm64-simulator support to FFmpeg Kit frameworks

[chownation]

Adds native arm64 simulator support to the FFmpeg Kit frameworks, enabling native performance on Apple Silicon Macs without requiring Rosetta 2 or EXCLUDED_ARCHS workarounds.

Changes

• Binary Patching: Utilized vtool to patch the Mach-O headers of existing arm64 device binaries, re-tagging them for the IOSSIMULATOR platform.
• Dependency Integration: Bundled the patched frameworks (binaries + headers) directly into the repository to support seamless integration via Git dependency.
• Architecture Validation: Verified architectures using lipo and vtool to ensure universal support (x86_64 + arm64-sim).

Verification

• Verified that all 8 core frameworks (libavcodec, libavformat, libavutil, etc.) pass the architecture check.
• Successfully built and ran on an iPhone 17 Pro simulator (ARM64) with functional video encoding.

[ahmetveysels]

its not working to me. 17 Pro

`
Launching lib/main.dart on iPhone 17 Pro in debug mode...
The following plugin(s) are excluding the arm64 architecture, which is a requirement for Xcode 26+:

• ffmpeg_kit_flutter_new
  Consider installing the "Universal" Xcode or file an issue with the plugin(s) to support arm64.
  Xcode build done. 69,5s
  Failed to build iOS app
  Error (Xcode): Building for 'iOS-simulator', but linking in dylib (/Users/avs/.pub-cache/git/ffmpeg_kit_flutter-f8ae8cc3da04a82f502f39a32d4671b546acaeaf/ios/Frameworks/ffmpegkit.framework/ffmpegkit) built for 'iOS'

Error (Xcode): Linker command failed with exit code 1 (use -v to see invocation)

Could not build the application for the simulator.
Error launching application on iPhone 17 Pro.

Exited (1).

`

[martin-headspace]

@chownation I was running into a similar issue, but I made sure to:

• remove config.build_settings['EXCLUDED_ARCHS[sdk=iphonesimulator*]'] = 'arm64' from my Podfile
• Check in my Xcode project that "EXCLUDED_ARCHS" was set to "EXCLUDED_ARCHS[sdk=iphonesimulator*]" = i386;

That did the trick. Can confirm this worked on my simulator.

[martin-headspace]

@symful @sk3llo thank you so much for your continued support on this library! Would you mind helping us review this PR?

It is proving to be very helpful!