build: add taplo formatting

[maschad]

Introduce https://taplo.tamasfe.dev/ for formatting our .toml files

I've extracted this out of #105

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 48.29%. Comparing base (2b50c5c) to head (40d43a4).
Report is 13 commits behind head on main.

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@@            Coverage Diff             @@
##             main     #328      +/-   ##
==========================================
- Coverage   48.30%   48.29%   -0.01%     
==========================================
  Files          37       37              
  Lines        6358     6359       +1     
==========================================
  Hits         3071     3071              
- Misses       3287     3288       +1     

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