Iter all events

[maxnoe]

Should fix #212 and #213

[dneise]

As far as I could see this is great and should be merged.

[codecov]

Codecov Report

Attention: Patch coverage is 94.84536% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 86.60%. Comparing base (87d6314) to head (ffa98ef).

Files	Patch %	Lines
src/eventio/simtel/simtelfile.py	94.44%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #214      +/-   ##
==========================================
- Coverage   86.81%   86.60%   -0.21%     
==========================================
  Files          24       24              
  Lines        2252     2240      -12     
==========================================
- Hits         1955     1940      -15     
- Misses        297      300       +3     

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[maxnoe]

I tested this with ctapipe and while it seems to work nicely and we are able to write all shower information now when not skipping non-triggered events with some small changes to the SimTelEventSource the default case of skipping non-triggered events is now approximately 10 % slower.

This is not great and I will see if I can get this performance drop back somehow.

[maxnoe]

Back to draft has we discovered that not all event state is cleared properly once an event as been returned (e.g. events without photo electrons "inherit" the last valid photo electron object)