feat: Implement experimental elinux support

[Losses]

This pull request introduces experimental eLinux support to Rinf. While there are still some modifications needed on the Flutter-eLinux side, I have initiated a discussion on this issue: Issue #270.

Given the stringent performance requirements of embedded environments, the performance advantages of Rust can significantly benefit embedded development.

[temeddix]

Thank you very much for the PR :)

Actually, Cargokit is not a Rinf product. Cargokit is maintained as a separated project by @irondash.

• https://github.com/irondash/cargokit

Rinf simply uses Git subtree to use Cargokit as part of the package. What do you think about creating a PR at Cargokit? I will be able to include the new changes in Rinf as soon as it gets merged over there.

[Losses]

Sure :P

[temeddix]

I've also created a PR at Cargokit to assist with the process

• Use flutter test in CI irondash/cargokit#80

[Losses]

I've also created a PR at Cargokit to assist with the process

* [Use `flutter test` in CI irondash/cargokit#80](https://github.com/irondash/cargokit/pull/80)

Thank you!