Added documentation, tests, and more

[MichaelClerx]

Fixes #14

• Added sphinx docs
• Added instructions to README.md, along with more developer info
• Improved and added missing docstrings where possible
• Turned VoltageProtocol.from_x methods from implicit static into explicitly declared classmethods (allowing inheritance)
• Added version number stored in file, used by code, setup.py, and docs
• Used ' and " consistently
• Full test coverage, fixes Try and get code coverage closer to 100% #6

Also raised some questions in #15 #16 #17 #18 and there are still other docstrings in Trace that could use a bit of work (what exactly is the output, what is a "trace file index" and what is the format "sweeps" are returned in etc

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.87%. Comparing base (f3b3dc4) to head (41b8d35).
Report is 28 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #21      +/-   ##
==========================================
+ Coverage   95.07%   97.87%   +2.80%     
==========================================
  Files           3        3              
  Lines         284      283       -1     
==========================================
+ Hits          270      277       +7     
+ Misses         14        6       -8     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[kwabenantim]

Everything looks good to me, just needs a minor update to flake8 settings.