Create release-plz.yml

[0xJepsen]

Followed the release-plz documentation The new workflow will run the two commands

• release-plz creates a pull request with the new versions, where it prepares the next release.
• release-plz releases the unpublished packages.
  the first command will open a PR that updates the toml and change log and generates a release tag
  the second command will publish to crates.io

Closes #617

[codecov]

Codecov Report

Merging #618 (30b3ead) into main (523d983) will increase coverage by 0.01%.
Report is 9 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #618      +/-   ##
==========================================
+ Coverage   60.32%   60.34%   +0.01%     
==========================================
  Files          26       26              
  Lines        5477     5477              
==========================================
+ Hits         3304     3305       +1     
+ Misses       2173     2172       -1     

Files	Coverage Δ
arbiter-core/src/environment/fork.rs	88.57% <100.00%> (+0.33%)	⬆️
bin/fork/mod.rs	85.71% <100.00%> (-0.12%)	⬇️

... and 1 file with indirect coverage changes

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[Autoparallel]

Does this work from CI?

[Autoparallel]

So does this do both Github and Crates releases for each of the crates? I don't know if I totally follow.