chore: bump version to 0.2.0 for release to PyPi and Docker HUb

[kentbull]

Bumps version on main to 0.2.0 to align with the v0.2.0 branch. Main should stay in sync with or be ahead of the latest release branch.

#366

[codecov]

Codecov Report

❌ Patch coverage is 93.57798% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.45%. Comparing base (676d7e8) to head (a26c4b1).
⚠️ Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
src/keria/app/ipexing.py	16.66%	5 Missing ⚠️
src/keria/app/grouping.py	0.00%	1 Missing ⚠️
src/keria/app/serving.py	66.66%	1 Missing ⚠️

❌ Your patch status has failed because the patch coverage (63.15%) is below the target coverage (75.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #382      +/-   ##
==========================================
- Coverage   93.80%   93.45%   -0.36%     
==========================================
  Files          37       37              
  Lines        8462     8543      +81     
==========================================
+ Hits         7938     7984      +46     
- Misses        524      559      +35     

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