Fixes and enhancements

[keurfonluu]

• Added: new function write_h5 to gather outputs in a single H5 container
• Added: option labels_order in read_output
• Added: support GENER file in toughio-merge
• Added: function run to run TOUGH from a Python script
• Added: support MINC input in MESHM block
• Added: option space_between_values to add an additional space between entries (True by default).
• Fixed: incorrect block TIMBC output
• Fixed: error when writing input when center is None
• Fixed: error when reading GENER file that ends with +++
• Fixed: error due to coordinate precision for ISOT (fixes Floating centers precision revision #141)
• Fixed: error when reading output written by T2WELL (fixes Parameters visualization problem (Gas saturation, XCO2aq, etc) #142)
• Changed: lines after +++ are read as ending comments
• Changed: better formatting to improve accuracy (e.g., 1.0e+05 -> 1.0e5)

Reminders:

• Run invoke format to make sure the code follows the style guide,
• Add tests for new features or tests that would have caught the bug that you're fixing,
• Write detailed docstrings for all functions, classes and/or methods,
• If adding new functionality, unit test it and add it to the documentation.

[codecov]

Codecov Report

Patch coverage: 82.15% and project coverage change: -0.79% ⚠️

Comparison is base (6094bb7) 91.27% compared to head (c43fc24) 90.48%.
Report is 7 commits behind head on master.

❗ Current head c43fc24 differs from pull request most recent head e987c44. Consider uploading reports for the commit e987c44 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #144      +/-   ##
==========================================
- Coverage   91.27%   90.48%   -0.79%     
==========================================
  Files          94       97       +3     
  Lines        6061     6148      +87     
==========================================
+ Hits         5532     5563      +31     
- Misses        529      585      +56     

Files Changed	Coverage Δ
toughio/_cli/_extract.py	87.23% <ø> (+1.51%)	⬆️
toughio/_io/output/tecplot/__init__.py	100.00% <ø> (ø)
toughio/_run.py	12.69% <12.69%> (ø)
toughio/_io/output/_helpers.py	83.67% <60.00%> (+0.69%)	⬆️
toughio/_mesh/_mesh.py	88.54% <66.66%> (-0.03%)	⬇️
toughio/_cli/_merge.py	83.33% <72.41%> (-5.80%)	⬇️
toughio/_io/input/_helpers.py	82.85% <80.00%> (-1.52%)	⬇️
toughio/_common.py	92.68% <85.71%> (-2.97%)	⬇️
toughio/_io/h5/_write.py	92.00% <92.00%> (ø)
toughio/_io/input/tough/_write.py	93.67% <95.31%> (-0.33%)	⬇️
... and 17 more

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