Fixed Move SideConditions and corrected protect classifications

[caymansimpson]

Did a couple of small things:

1. Fixed Protect Classifications, according to Bulbapedia
2. Added SideConditions found in Moves that weren't previously recorded (collected through regex filtering of gen[1-9]moves.json)
3. Fixed move.side_condition to return a SideCondition object, consistent with Terrain/Weather/Effect/Status
4. Added tests for SideCondition to ensure better maintainability, similar to what I did with volatile_status -- ensuring that if a new SideCondition pops up, we will have it captured in the enum. Also ensuring that we don't have extra SideConditions not available in Showdown
5. Added small functionality to move_generator in test_move so that we can more easily test different generations of moves to ensure multi-generational compatibility

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.56%. Comparing base (f458350) to head (e26da2b).
Report is 50 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #557      +/-   ##
==========================================
+ Coverage   83.38%   84.56%   +1.17%     
==========================================
  Files          39       42       +3     
  Lines        3918     4198     +280     
==========================================
+ Hits         3267     3550     +283     
+ Misses        651      648       -3