DEV 953: Add basic maps support to CLI

[robbles]

This allows using a pre-configured map when running games via battlesnake play.

This PR also cleans up a couple of things:

• remove squad support and switch to using pipelines only in RulesBuilder
• refactor play command to remove global variables and fix a few bugs
• fixes a bug in the new map version of Royale where food wasn't generated after turn zero

[codecov-commenter]

Codecov Report

Merging #74 (85f593e) into main (2d83420) will decrease coverage by 2.87%.
The diff coverage is 38.24%.

@@            Coverage Diff             @@
##             main      #74      +/-   ##
==========================================
- Coverage   66.89%   64.01%   -2.88%     
==========================================
  Files          21       20       -1     
  Lines        1169     1095      -74     
==========================================
- Hits          782      701      -81     
- Misses        372      374       +2     
- Partials       15       20       +5     

Impacted Files	Coverage Δ
cli/commands/root.go	11.11% <0.00%> (-0.66%)	⬇️
client/models.go	0.00% <ø> (ø)
constants.go	100.00% <ø> (ø)
maps/game_map.go	100.00% <ø> (ø)
pipeline.go	100.00% <ø> (ø)
solo.go	83.33% <ø> (ø)
wrapped.go	80.95% <ø> (-4.77%)	⬇️
cli/commands/play.go	18.38% <28.72%> (-4.24%)	⬇️
maps/royale.go	48.38% <50.00%> (+44.93%)	⬆️
ruleset.go	88.05% <86.66%> (-1.74%)	⬇️
... and 13 more

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