shared script to be used by both our release and RBs

Basically we need a script which could have some common build steps that would be used by our CI for releases and at the same time RBs like IzzyDroid (https://github.com/RevEngiSquad/revengi-app/issues/43#issuecomment-4468801648 @IzzySoft) to keep up with any changes we may make by introducing new dependencies, changing current tool (rust, ndk etc.) versions.

For now, I haven't really been able to come up with a satisfactory way to do this, I've tried taking help of some AI agents but their response wasn't up to my liking as well.