refactor: move converter from utils

[Silvanoc]

Move linkml.utils.converter to linkml.converter.cli, which is more consistent with the structuring of other tools in the repo:

• Package for the top-level functionality.
• CLI specific to that functionality inside of that package.
• Integration into higher-level CLI.

Refactoring proposed in issue #2371.

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 83.80%. Comparing base (c4b39f7) to head (54c5208). :warning: Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2716      +/-   ##
==========================================
+ Coverage   80.43%   83.80%   +3.37%     
==========================================
  Files         141      141              
  Lines       15715    15715              
  Branches     3187     3187              
==========================================
+ Hits        12640    13170     +530     
+ Misses       2408     1842     -566     
- Partials      667      703      +36     

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[ialarmedalien]

Looking at the other files that have been put in utils, should there be a set of data utility packages? I'm not totally convinced by this one.

I do think that there are other module moves on your list that are no brainers -- e.g. moving the generators.py base model into the generators dir -- that could be done quickly and painlessly if you were willing to create PRs for them.

Thanks for your continued efforts to improve the quality and accessibility of linkml!

[Silvanoc]

Looking at the other files that have been put in utils, should there be a set of data utility packages?

@ialarmedalien the mess that the utils directories have become was the reason why @sneakers-the-rat created #2371, that motivated this PR. So a lot of changes are needed there...

Having said that, I'm not sure what you mean with "data utility packages" 🫣 Could you elaborate a bit?