add driver for HP8594E

[RasmusBC59]

adds QCoDeS driver for the Hewlett Packard HP8594E Network Analyzer

[codecov-commenter]

Codecov Report

Merging #191 (4d642e8) into main (800ca06) will increase coverage by 0.24%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##             main     #191      +/-   ##
==========================================
+ Coverage   21.23%   21.47%   +0.24%     
==========================================
  Files         130      132       +2     
  Lines       16083    16170      +87     
==========================================
+ Hits         3415     3473      +58     
- Misses      12668    12697      +29     

Impacted Files	Coverage Δ
qcodes_contrib_drivers/drivers/HP/HP8594E.py	59.72% <59.72%> (ø)
qcodes_contrib_drivers/tests/HP/test_HP8594E.py	100.00% <100.00%> (ø)

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