Update ReactorNet drawing functions

[speth]

Changes proposed in this pull request

• Avoid maintaining redundant docstrings in drawnetwork.py -- just reference the docs for the member function versions
• Fix ability to pass arguments to ReactorNet.draw to show composition for all reactors in the network
• When drawing the state, put the reactor label inside the reactor boundary to avoid ugly overlaps

If applicable, provide an example illustrating new features this pull request is introducing
Graph generated by adding

mixer.draw(print_state=True, species="X")

to mix1.py:

Checklist

• The pull request includes a clear description of this code change
• Commit messages have short titles and reference relevant issues
• Build passes (scons build & scons test) and unit tests address code coverage
• Style & formatting of contributed code follows contributing guidelines
• The pull request is ready for review

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 72.82%. Comparing base (f4a88d2) to head (87218b5).

Files	Patch %	Lines
interfaces/cython/cantera/drawnetwork.py	80.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1714      +/-   ##
==========================================
- Coverage   72.83%   72.82%   -0.01%     
==========================================
  Files         379      379              
  Lines       53593    53595       +2     
  Branches     9122     9123       +1     
==========================================
+ Hits        39032    39033       +1     
- Misses      11609    11610       +1     
  Partials     2952     2952              

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[bryanwweber]

Thanks @speth!