Add to flutter_rust_bridge CI external tests?

[fzyzcjy]

I am thinking about adding polars_dart to flutter_rust_bridge's CI for extra tests. What do you think? Looking forward to your thoughts!

[Desdaemon]

There's just the last issue of common structs methods not being able to receive self, but yeah I can clean up this code (or parts of it) for flutter_rust_bridge.

[fzyzcjy]

Take your time and feel free to submit issues/PRs for the issue!

[fzyzcjy]

Btw I forget to mention details of adding to CI. There seems to be at least two approaches:

1. Add a section of flutter_rust_bridge CI script, which clones polars_dart, modifies the dependency (to use master branch frb), runs test, etc.
2. Copy (or move) code into flutter_rust_bridge/frb_examples/polars_dart folder, and use existing testing infra.