Support additional precompiled dependencies

[Beanow]

Some work in progress supporting #9
Depends on changes in the wasm compiler.

This isn't an opinion about which packages should be selected.
I picked some arbitrary examples to showcase being able to.

Testing

# Check out my fork, adding wasm compiler features
git clone --branch playground-packages https://github.com/Beanow/gleam.git

# Build that for the playground
GLEAM_DIR=gleam ./bin/build-forked-compiler

# Profit!
gleam run

The imports currently available are:

const available_packages = ["filepath", "gleam_stdlib", "globlin"]

[lpil]

Hello! Thank you but this work is premature and cannot be accepted. We have not agreed that we want to implement this feature and forking the compiler is not an option.

[Beanow]

I agree on both.

It's some work to get the ball rolling on this.
Upstream issue gleam-lang/gleam#3928
And PRs

• feat(wasm): support loading precompiled dependencies in /lib gleam#3924
• feat(wasm): support optional /gleam.toml gleam#3929