Update documentation for SuperLinq

[viceroypenguin]

This PR updates the documentation system for SuperLinq:

1. Add LinqPad samples for each method
2. Add example sections for each method
   • Use LinqPad samples to generate code snippet for example section

Fixes #398

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (79347f3) 92.88% compared to head (5bd16b5) 92.86%.
Report is 3 commits behind head on master.

❗ Current head 5bd16b5 differs from pull request most recent head 411150b. Consider uploading reports for the commit 411150b to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #495      +/-   ##
==========================================
- Coverage   92.88%   92.86%   -0.02%     
==========================================
  Files         255      255              
  Lines        8080     8089       +9     
  Branches     1621     1621              
==========================================
+ Hits         7505     7512       +7     
- Misses        364      366       +2     
  Partials      211      211              

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