show all atoms data

[PythonFZ]

This PR improves which data can be visualized in the GUI

• update all plotting tools to use metadata correctly.
• update the readme with the new features
• do not jump to None or undefined

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 25.27473% with 68 lines in your changes missing coverage. Please review.

Project coverage is 54.41%. Comparing base (684e781) to head (f64465e).

Files	Patch %	Lines
zndraw/analyse/__init__.py	17.80%	60 Missing ⚠️
zndraw/scene.py	30.00%	7 Missing ⚠️
zndraw/utils.py	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #639      +/-   ##
==========================================
- Coverage   55.72%   54.41%   -1.32%     
==========================================
  Files          35       35              
  Lines        2848     2913      +65     
==========================================
- Hits         1587     1585       -2     
- Misses       1261     1328      +67     

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