Add a check for formatting of the `Cargo.toml` files to CI, and run
`taplo format` to fix existing formatting issues.
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Signed-off-by: Martin Garton <garton@gmail.com>
Add further missing repository keys / descriptions, which I missed in
#43451 due to a suboptimal grep (assuming that rust-version.workspace is
always the last item).
Additionally fix crate self-references, which caused cargo-publish to
fail, due to it trying to fetch the crate from crates.io.
When specifying the current crate in `[dev-dependencies]` to enable a
test feature or similar, apparently one should not use `workspace =
true` and instead use `path`.
This requires extending the previously added `tidy` check, to allow
`path` dependencies in this specific case outside of the workspace
Cargo.toml.
Testing: Covered by existing tests
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Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>
