✨ Recursively query parents and children

[Koncopd]

This PR adds query_parents and query_children methods to HasParents class. This allows to query all parents and parents of parents etc. recursively for all records that have parents (instances of subclasses of HasParents).

Example:

import lamindb as ln

label1 = ln.ULabel(name="label1")
label2 = ln.ULabel(name="label2")
label3 = ln.ULabel(name="label3")
label1.save()
label2.save()
label3.save()
label1.children.add(label2)
label2.children.add(label3)
label3.query_parents() # returns a QuerySet with label1 and label2
label1.query_children() # returns a QuerySet with label2 and label3

Closes #2060

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.53%. Comparing base (c41fc2c) to head (1ab7f1a).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2106   +/-   ##
=======================================
  Coverage   92.52%   92.53%           
=======================================
  Files          54       54           
  Lines        6435     6442    +7     
=======================================
+ Hits         5954     5961    +7     
  Misses        481      481           

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[github-actions]

🚀 Deployed on https://671a154e02dcafae9d3ac8eb--lamindb-qnwk.netlify.app

[falexwolf]

This looks very elegant both in terms of the actual implementation and the user-facing API design. Kudos!

The only thing that's missing: a nice user-facing description of this PR.

[Koncopd]

Ok, adding and merging then.