Make realmWriteAsync a global function, renaming of other global realm functions per swift conventions

- Make Sync use its own background thread
- Make a `Settings.shared` instance that works from the main thread, and automatically create a new realm in the current thread when using `Settings.init()`

Listener and setting for auto-reloading when CVU is edited in developer tool

See merge request memri/ios-application!141

Integrate first indexer

See merge request memri/ios-application!140

Fix indexer showing correctly

See merge request memri/ios-application!139

Working POD integration and completed edge refactor

See merge request memri/ios-application!138

Address lookup invalidation, fix notes plainText display, fix modal issues

See merge request memri/ios-application!137