Add gto doctor

[aguschin]

Close #241
Close #142
Close #317

This just reads repo for now, and prints the error. Basically you can have the same effect if you run gto show and gto describe for all commits you want.

$ gto doctor
🪴  GTO Version: 0.2.5.dev4+g89fca05
---------------------------------
INDEX='artifacts.yaml'
TYPES=None
STAGES=None
LOG_LEVEL='INFO'
DEBUG=False
ENRICHMENTS=[]
AUTOLOAD_ENRICHMENTS=True
CONFIG_FILE_NAME='.gto'
EMOJIS=True
---------------------------------
✅  No issues found

TODO:

• read checkouted commit
• read all commits. Support args for (un)selecting all branches/commits?
• check Git tags as well
• describe should read artifacts.yaml from workspace #142
• add tests
• fix gto describe churn#dev#1 should work differently #317
• add case from gto describe churn#dev#1 should work differently #317 to the docs
• describe: no error if no annotation, but if annotation exists and no key, then error 🤷🏻‍♂️
• To consider: in DVC doctor have different meaning.
• add gto doctor to docs - added in ref: doctor + mlem.ai#259

[codecov-commenter]

Codecov Report

Base: 86.61% // Head: 85.94% // Decreases project coverage by -0.66% ⚠️

Coverage data is based on head (5cb88a8) compared to base (0600c0e).
Patch coverage: 68.96% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #316      +/-   ##
==========================================
- Coverage   86.61%   85.94%   -0.67%     
==========================================
  Files          18       18              
  Lines        2069     2113      +44     
==========================================
+ Hits         1792     1816      +24     
- Misses        277      297      +20     

Impacted Files	Coverage Δ
gto/api.py	89.78% <50.00%> (-2.71%)	⬇️
gto/index.py	87.41% <57.69%> (-3.98%)	⬇️
gto/exceptions.py	73.60% <80.00%> (+0.04%)	⬆️
gto/cli.py	81.84% <84.21%> (+1.32%)	⬆️
gto/tag.py	89.79% <0.00%> (-2.05%)	⬇️

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