The prior workflow (now deleted) required manually specifying the packages to
check and only checked the package could compile under the stated MSRV. It
didn't verify it was actually the _minimum_ supported Rust version. The new
version finds the MSRV from scratch to check if the stated MSRV aligns.
Updates stated MSRVs accordingly.
Also removes many explicit dependencies from secq256k1 for their re-exports via
k256. Not directly relevant, just part of tidying up all the `toml`s.
This resolves the conflicts and gets the workspace `Cargo.toml`s to not be
invalid. It doesn't actually get clippy to pass again yet.
Does move `crypto/dkg/src/evrf` into a new `crypto/dkg/evrf` crate (which does
not yet compile).
Abstract, to be done for the transactions, the batches, the cosigns, the slash
reports, everything. It has a minimal API itself, intending to be as clear as
possible.
