Add `rustler_precompiled` and set up process of pre-compiling the Rust dependency

[tmr08c]

Since this project uses Rustler, I was curious if would you be open/interested in contributions to set up rusteler_precompiled.

I am not sure the benefits (end-users not needing to have the Rust toolchain setup) would outweigh the costs (I think this is mostly the updated release flow) for you, so I wanted to ask.

https://github.com/elixir-nx/explorer/pull/123 is an example of setting rustler_precompiled up for the Explorer package for reference of the scope of code changes.

[praveenperera]

Ya that would be fine with you, would you want to do the PR @tmr08c ?

[tmr08c]

Thank you for the interest, @praveenperera, I hope that it proves valuable.

I am definitely interested in opening up a PR.

Just to set expectations around timing - it may be about a week before I can get started on this. If anyone else sees this Issue and wants to make progress sooner, I don’t want to block them. If I don’t see any updates on the thread I’ll plan to proceed.

[praveenperera]

That sounds great @tmr08c