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[bot]]

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 :warning:

Additional details and impacted files

```diff @@ 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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