refactor: extract global typings

[noomorph]

Description

• This pull request addresses the issue described here: Avoid globals in the typescript type definitions #4223

In this pull request, I have split index.d.ts into detox.d.ts and globals.d.ts.

This will allow us to make a breaking change about types in Detox 21, e.g.:

   "compilerOptions": {
    ...
-     "types": ["node", "jest", "detox"]
+     "types": ["node", "jest", "detox/globals"]
   },