Enforce no-std compatibility in CI

[tomaka]

Close #106

This is not passing, but this PR can be used as a way to track progress.

[mergify]

Automatically approving tomaka's pull requests. This auto-approval will be removed once more maintainers are active.

[github-actions]

twiggy diff report

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[gilescope]

Is it possible to compile smoldot for wasm32-unknown-unknown? Would be great to get that enforced in the CI too. I wanted to try and use it from a wgpu rendered bevy client on the browser but when I pull in the dep:

smoldot = { git= "https://github.com/paritytech/smoldot.git", default-features = false }

it grumbles about sql light which is odd as I told it no default features...

[tomaka]

wasm32-unknown-unknown has a std, so this is off topic.
But yes, the smoldot and smoldot-light-base libraries compile for Wasm, that is checked by CI.