chore: Adds release-please workflow.

[yorik]

What ❔

Adds release-please workflow triggered by push into main branch.

Why ❔

Preparing to use the repo for releases.

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via zk fmt and zk lint.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (a980ac6) 31.49% compared to head (a04de4c) 31.58%.

❗ Current head a04de4c differs from pull request most recent head a4934d1. Consider uploading reports for the commit a4934d1 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #105      +/-   ##
==========================================
+ Coverage   31.49%   31.58%   +0.09%     
==========================================
  Files         477      477              
  Lines       25429    25429              
==========================================
+ Hits         8010     8033      +23     
+ Misses      17419    17396      -23     

see 4 files with indirect coverage changes

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