MRG: Add "kind" kwarg to update_anat_landmarks()

[hoechenberger]

WIP:

• Tests
• Changelog

Merge checklist

Maintainer, please confirm the following before merging:

• All comments resolved
• This is not your own PR
• All CIs are happy
• PR title starts with [MRG]
• whats_new.rst is updated
• PR description includes phrase "closes <#issue-number>"

[codecov]

Codecov Report

Merging #957 (507fdc3) into main (6711c69) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #957      +/-   ##
==========================================
+ Coverage   94.51%   94.52%   +0.01%     
==========================================
  Files          25       25              
  Lines        3573     3583      +10     
==========================================
+ Hits         3377     3387      +10     
  Misses        196      196              

Impacted Files	Coverage Δ
mne_bids/read.py	96.11% <100.00%> (ø)
mne_bids/sidecar_updates.py	98.80% <100.00%> (+0.16%)	⬆️

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[agramfort]

so far so good. Tell me when I can do a final pass and merge this.

thx @hoechenberger

[agramfort]

thx @hoechenberger