Add initial tests

[danieletorelli]

This is a preliminary work that aims to set foundations to new features and changes, providing a base set of unit tests.
I also bumped dependencies here and there and cleaned up the deprecated toolchain action in CI.

The unit tests have some parts disabled because (still) unsupported in codegen.

[danieletorelli]

I also added the job that compiles the output files with scalac. Please find a sample run in my fork: https://github.com/danieletorelli/golem-scalajs-wit-bindgen/actions/runs/10485208393

[vigoo]

Nice!

Some notes:

• stream and future are coming with wasi preview3 and we are not supporting it for a while so those are not important
• use and import, and resource support (fully, with constructors, methods and static methods and proper dropping) are very important to do anything useful (http, rpc etc)

[danieletorelli]

Nice!

Some notes:

• stream and future are coming with wasi preview3 and we are not supporting it for a while so those are not important
• use and import, and resource support (fully, with constructors, methods and static methods and proper dropping) are very important to do anything useful (http, rpc etc)

Thank you, I look forward to a discussion where we could design a way to efficiently provide support for use and import constructs in Scala/Scalajs. For now indeed those parts are commented out in the tests but I see indeed that they are fundamental to make anything meaningful.