Add Support for patches in nightly

[riteshshukla04]

This adds supports for patch file. Library maintainers can submit the patch file to modify template (if library requires changes in podfile, build.gradle, manifest etc.)

[riteshshukla04]

I added a patch for react native reanimated (babel.config.js changes required by worklets).
There is a script for make-patch and apply-patch which can be used to create and apply patch respectively.

[riteshshukla04]

@cortinico Can you please have a look here

[cortinico]

This is great! I've left some nits but overall looks great

[riteshshukla04]

I have addressed the following issue.

1. I have added firebase app which actual requires a pod file change to use frameworks. Now the build succeeds. 🚀. We can close this PR (libraries: add @react-native-firebase/app #17)
2. Now if patch file is wrong . The pipeline ends .
3. I did a minor change in mmkv . Basically added mrousavy as maintainer so that a non patch library can run and I can verify I havent broken anything :P.

cc:- @cortinico