Extend available NP2 probe types

[alejoe91]

Added commersial versions of NP2 probes:

• 2003: single shank - no metal cap
• 2004: single shank - metal cap
• 2013: 4 shanks - no metal cap
• 2014: 4 shanks - metal cap

TODO

• Add test files and extend tests

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4e5de6f) 88.59% compared to head (543ecdd) 89.07%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #217      +/-   ##
==========================================
+ Coverage   88.59%   89.07%   +0.47%     
==========================================
  Files          10       10              
  Lines        1710     1711       +1     
==========================================
+ Hits         1515     1524       +9     
+ Misses        195      187       -8     

Files	Coverage Δ
src/probeinterface/io.py	88.00% <100.00%> (+1.13%)	⬆️

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