Feat: Legacy offline manager

[orca-nazar]

Description

Added Legacy Offline Manager module based on this discussion.

Checklist

• I have tested this on a device/simulator for each compatible OS
• I updated the documentation with running yarn generate in the root folder
• I added/updated a sample - if a new feature was implemented (/example)

[mfazekas]

@orca-nazar thanks much, I have concerns about doing it as.a build variant.

• We have enough variants V11 and fabric, we should only add more variants only if realy-really necessary
• JS interface will of Legacy and regular is the same. So if we change the js interface we should be careful not to affect on or the other.

So I'd prefer a duplicating the JS code and having 2 component instead of conditions compilation.

What do you think?

[orca-nazar]

@mfazekas Good points. I will create offlineManagerLegacy.ts and OfflinePacksLegacy.ts as both of them will depend on the native module. Not sure about a sample in Example app and documentation. Do you think it would be good to duplicate it as well?

[orca-nazar]

@mfazekas Hey, updated PR with the new JS class for Legacy manager. It misses packs subscriptions functionality. If someone requests, I will add them as well

[mfazekas]

@orca-nazar looks good to me, can you look into the CI?

[orca-nazar]

@orca-nazar looks good to me, can you look into the CI?

@mfazekas So to trigger CI, I need to get your approval. I think I fixed it