fix: Correct parsing of TS_NMDH for plexos parser

[pesap]

List of changes

• Fixed a problem when parsing time series file with name, month, day and hour (DATAFILE_COLUMNS.TS_NMDH). This was populating with nan the output time series
• Added additional gas options

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 76.81%. Comparing base (73087e2) to head (8b942fb).

Files with missing lines	Patch %	Lines
src/r2x/parser/plexos.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #100      +/-   ##
==========================================
- Coverage   76.82%   76.81%   -0.01%     
==========================================
  Files          39       39              
  Lines        3836     3835       -1     
==========================================
- Hits         2947     2946       -1     
  Misses        889      889              

Files with missing lines	Coverage Δ
src/r2x/parser/plexos.py	53.62% <0.00%> (-0.06%)	⬇️