Refactor and cleanup for version 11.

[gagik]

This is a rather large refactor that mainly does the following:

General:

• Fixes ESLint / prettier lint / typescript errors.
• Introduces more type safety in different parts of the code and refactors bits and pieces where types or other conflicts were not handled correctly.

/realm-flipper-plugin-device - Device library

• Improves the way listeners work with regards to additions/deletions/modifications. Listener.ts => PluginConnectedObjects.ts
• _objectKey field being used for serialized objects renamed to _pluginObjectKey to avoid conflicts with Realm function but should likely be changed completely in future implementation. See #86 and #121.

/flipper-plugin-realm - Desktop plugin

• Adds realm as a dev dependency so the underlying types used by the desktop plugin extend Realm classes (thus making it easier to notice i.e. breaking changes or other conflicts in future releases).

/testApp - Plugin test application

• Now built on top of the Realm TS template app using a simple drop-in replacement, making it easier to update to future versions. All new additions are reflected in metro config, package.json, index.ts and testApp/flipperTest directory, the rest is just regular template code.
• Added metro config to make sure it uses the local device library implementation.
• Has both legacy tests as well as ability to test with the template ToDo app.

[takameyer]

Just read through a bit of the code. I'll give this a more thorough review when it's marked as ready. But really, awesome work so far. I think the community will really appreciate this, and hopefully also start making their own PRs for it.

[gagik]

Just adding some comments while those are fresh on my mind.

[gagik]

I am removing realm as a dependency... pretty sure all of this is meant to be peer dependencies rather than dependencies and I am trying to minimize unnecessary ones. I think react-native-flipper can be moved as well.

[takameyer]

Yes, these should all be peerDependencies

[takameyer]

Very nice work. Thanks for the tour of the flipper code :)
I have a few comments/suggestions/questions, but nothing holding this back.

[takameyer]

Yes, these should all be peerDependencies