Child NodePath's

[niklasmueboe]

Add functions to get the NodePaths for the children of a Group.

Originally, the idea was to get the NodeNames. However, with the recursive option the name is ambiguous because the prefix is unknown. One consideration would be to get the relative path starting at the current Group, but currently there is no data structure for that and it may not be worth creating one for that use case. It would also be possible to just use a normal String for the relative path.

Thoughts?

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 33 lines in your changes missing coverage. Please review.

Project coverage is 81.58%. Comparing base (4154697) to head (c4f2241).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
zarrs/src/group.rs	0.00%	30 Missing ⚠️
zarrs/src/node.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #112      +/-   ##
==========================================
- Coverage   81.71%   81.58%   -0.14%     
==========================================
  Files         166      166              
  Lines       23578    23611      +33     
==========================================
- Hits        19267    19263       -4     
- Misses       4311     4348      +37     

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[LDeakin]

The methods introduced in this PR look good if you are happy with them.

Originally, the idea was to get the NodeNames. However, with the recursive option the name is ambiguous because the prefix is unknown. One consideration would be to get the relative path starting at the current Group, but currently there is no data structure for that and it may not be worth creating one for that use case.

Yeah, I don't think such a structure is needed especially since a relative path isn't really consumable elsewhere in this library. At least with your new APIs that can grab nodes/node paths, you could just use something like node.path().as_str().strip_prefix(group.path().as_str()) to get relative paths as strings.

[niklasmueboe]

Then I think it should be good for now.