Add sel function to Constraint and AnonymousConstraint

[FabianHofmann]

Improves inspection of existing constraints.

[codecov]

Codecov Report

Patch coverage: 73.07% and project coverage change: -0.16 ⚠️

Comparison is base (b261708) 89.43% compared to head (3ca7bac) 89.27%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #115      +/-   ##
==========================================
- Coverage   89.43%   89.27%   -0.16%     
==========================================
  Files          14       14              
  Lines        2725     2751      +26     
  Branches      422      428       +6     
==========================================
+ Hits         2437     2456      +19     
- Misses        206      211       +5     
- Partials       82       84       +2     

Impacted Files	Coverage Δ
linopy/constraints.py	93.28% <73.07%> (-1.40%)	⬇️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.