Fix MacOS build

[zeyus]

I have access to an MacOS computer (and iPads), so I thought I could have a stab at getting the build working. I've been working a lot with dart and flutter for my research platform, and have had to deal with some similar issues (with the exception of rust libs, I've been using C FFI native libs).

I'm looking for some feedback on this PR, both in terms of scope and how you would like to have it chunked.

What this PR does already:

• Makes the build for MacOS work
  • Adds required entitlements and Info.plist entries
• Allows commet to launch

What doesn't work yet:

• Critically, the build does not find the vodozemac / flutter_vodozemac library, and I haven't yet figured out why - the build does make the lib, but ends up outputting it as flutter_vodozemac (not, e.g. libflutter_vodozemac.dylib), but I made a quick test pointing directly to the lib file and it still didn't find it. I would need to spend more time investigating.

Untested yet:

• iOS, while I added the required entries for camera and mic to the Info.plist, I haven't built and tested iOS yet

I guess my main question before turning this into a fully-fledged PR is:

• Is it enough to merge this as an incremental step towards a MacOS / iOS build?
• If not, how should I break it down to avoid this becoming too unweildy?
• important: While using the main github version of the apple media_kit_* packages fixes the main problem that broke the build, obviously pointing to the head of a repo is dangerous. Would you prefer:
  • Pointing to a specific commit hash
  • That I make a fork / branch
  • That commetchat org makes a fork / branch

any is fine for me, once I know I can update the PR.

Thanks!

Edit: I wanted to make it clear that none of the changes in the PR, nor the text above used generative AI.