Migrate dev and docs from optional dependencies to PEP 735 dependency groups

[lochhh]

References

neuroinformatics-unit/movement#955

How has this PR been tested?

Tested in neuroinformatics-unit/movement#956

Does this PR require an update to the documentation?

Installation command has been updated.

Checklist:

• The code has been tested locally
• Tests have been added to cover all new functionality
• The documentation has been updated to reflect any changes
• The code has been formatted with pre-commit

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.45%. Comparing base (33adaa5) to head (0948c6b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #156   +/-   ##
=======================================
  Coverage   99.45%   99.45%           
=======================================
  Files           8        8           
  Lines         554      554           
=======================================
  Hits          551      551           
  Misses          3        3           

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[niksirbi]

use build_sphinx_docs@main as v2 doesn't support this

Should we make an actions release instead? We haven't had one in a while.

[lochhh]

Should we make an actions release instead? We haven't had one in a while.

✅ https://github.com/neuroinformatics-unit/actions/releases/tag/v2.13.0

I'll revert to v2 here