fix cargo workspace publishing

[OmarTawfik]

Currently our publishing pipeline is failing to publish workspace crates that have internal dependencies:
https://github.com/NomicFoundation/slang/actions/runs/9468852124/job/26088399371

error: all dependencies must have a version specified when publishing.
  dependency `metaslang_cst` does not specify a version

This is a known bug/limitation of cargo publish: rust-lang/cargo#11133

To get around this, I'm explicitly adding versions to all internal dependencies, and switching our versioning workflow to use cargo set-version to update all of them when creating the changesets PR.

[changeset-bot]

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Latest commit: 2242278

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