Add workflow to bump version + generate changelog

[emmyoop]

Description

Automate version bump + changelogs generation before release.

Currently a separate manual step to run so I can test to ensure it works as expected.

Checklist

• I have read the contributing guide and understand what's expected of me
• I have signed the CLA
• I have run this code in development and it appears to resolve the stated issue
• I have opened an issue to add/update docs, or docs changes are not required/relevant for this PR
• I have run changie new to create a changelog entry

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.89%. Comparing base (243568e) to head (f446358).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #232   +/-   ##
=======================================
  Coverage   68.89%   68.89%           
=======================================
  Files          52       52           
  Lines        3433     3433           
=======================================
  Hits         2365     2365           
  Misses       1068     1068           

Flag	Coverage Δ
unit	68.89% <ø> (ø)

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