docs: add sphinx-docs & GH Pages

[AngryMaciek]

Description

Project webpage ready; major refactoring; sphinx-docs

Fixes #18

Type of change

• New feature (non-breaking change which adds functionality)
• Documentation updated

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have not reduced the existing code coverage

[codecov-commenter]

Codecov Report

Merging #26 (add8da2) into master (a8bd564) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #26   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            6         5    -1     
  Lines          883       880    -3     
=========================================
- Hits           883       880    -3     

Impacted Files	Coverage Δ
moranpycess/CustomExceptions.py	100.00% <ø> (ø)
moranpycess/Individual.py	100.00% <100.00%> (ø)
moranpycess/MoranProcess.py	100.00% <100.00%> (ø)
moranpycess/MoranProcess2D.py	100.00% <100.00%> (ø)
moranpycess/MoranProcess3D.py	100.00% <100.00%> (ø)

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