Ignore disabled models/sources by default, unless --include-disabled is passed

[BAntonellini]

Fixes #129

[codecov-commenter]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (fa97a7e) 98.38% compared to head (3779b78) 97.92%.

Files	Patch %	Lines
dbt_checkpoint/utils.py	50.00%	8 Missing and 3 partials ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #171      +/-   ##
==========================================
- Coverage   98.38%   97.92%   -0.47%     
==========================================
  Files          50       50              
  Lines        2481     2458      -23     
  Branches      322      327       +5     
==========================================
- Hits         2441     2407      -34     
- Misses         24       32       +8     
- Partials       16       19       +3     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.