Analysis point fixes

[baggepinnen]

This PR fixes a few things related to analysis points

• Handle loop openings in same analysis point as input or output
• Fix for analysis points in systems with units
• utility to print all existing analysis points

cc @shobhitvoleti

[codecov]

Codecov Report

Attention: Patch coverage is 82.35294% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 54.58%. Comparing base (200b13a) to head (00601f2).

Files	Patch %	Lines
src/Blocks/analysis_points.jl	82.35%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #298      +/-   ##
==========================================
- Coverage   61.56%   54.58%   -6.99%     
==========================================
  Files          46       46              
  Lines        1470     1680     +210     
==========================================
+ Hits          905      917      +12     
- Misses        565      763     +198     

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