Some fixes for CI and README

[casabre]

• fail on codecov error again
• adding badges to README and topics

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.46%. Comparing base (af2e5ff) to head (92196e0).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #3   +/-   ##
=======================================
  Coverage   90.46%   90.46%           
=======================================
  Files          10       10           
  Lines         388      388           
=======================================
  Hits          351      351           
  Misses         22       22           
  Partials       15       15           

Flag	Coverage Δ
go	90.46% <ø> (ø)
python	90.46% <ø> (ø)
rust	90.46% <ø> (ø)
typescript	90.46% <ø> (ø)

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