multi-process mode

[CristiCeban]

This PR:

• add multi-process mode for android (all hail to this PR).
• add option to disable multi-process for iOS if AppGroup is present in bundle. Needed for this. Now if an application has AppGroup set for some reason and does not want to save the data in the appGroup location, it will be able to use the default mmkv location by setting mode:single-process.
• update the documentation on the mode configuration.
• update the example app to work with xcode 15.

I'm not sure about moving the RCTUnsafeExecuteOnMainQueueSync() function to the createFromHostFunction() function. I've tested it on iOS and it seems to work without problems. I attach the video:

Screen.Recording.2024-02-27.at.15.43.47.mov

[mrousavy]

Hey, thanks so much for your PR, this is really exciting. I am a bit swamped with work right now, so it might take a few days before I can review this, hope you understand!

[CristiCeban]

I'm closing this PR because v3 is supporting MULTI_PROCESS and SINGLE_PROCESS mode

[mrousavy]

Hey - shit sorry I forgot to get back to this PR now.

Thanks so much for this, yea I added this to V3 already (with an enum now not a TS union, but this is for some reason broken in CodeGen), so this is now obsolete. Thank you tho!