docs: switch to zensical

[smlloyd]

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📚 Documentation preview 📚: https://aimbat--213.org.readthedocs.build/en/213/

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 93.18%. Comparing base (10fe886) to head (c4458df).
⚠️ Report is 2 commits behind head on master.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/aimbat/lib/seismogram.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #213      +/-   ##
==========================================
+ Coverage   93.06%   93.18%   +0.11%     
==========================================
  Files          32       32              
  Lines        1615     1599      -16     
==========================================
- Hits         1503     1490      -13     
+ Misses        112      109       -3     

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