Automate publishing (and changelogs?)

[hecatia-elegua]

current workflow is:

• modify Cargo.toml version and dependency version of bilge-impl
• cd bilge-impl
• cargo publish --dry-run (until it works)
• cargo publish
• cd ..
• commit changes in Cargo.toml, push, PR, wait for ci and merge or do next steps first while waiting on ci
• cargo publish --dry-run (until it works)
• cargo publish
• done

This is a nice little automation task. The next step would be to add changelog publishing to this as well.

https://github.com/orhun/git-cliff uses conventional commits, might still be worth looking into