Update and review of dependabot config

[tcarmet]

• re-configure dependabot groups for pip
• Add support for devcontainers

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.68%. Comparing base (bb7c54b) to head (45ceaa4).
Report is 2 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #643      +/-   ##
==========================================
+ Coverage   86.47%   86.68%   +0.21%     
==========================================
  Files          34       34              
  Lines        1412     1412              
==========================================
+ Hits         1221     1224       +3     
+ Misses        191      188       -3     

Flag	Coverage Δ
api	64.94% <ø> (ø)
unit	67.49% <ø> (+0.21%)	⬆️

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