Extract helpers

[olistic]

• [x] Extract getLevelConfig into its own package.
• [x] Extract scoring logic into helper packages.

[codecov-io]

Codecov Report

Merging #215 into master will increase coverage by <.01%. The diff coverage is 89.74%.

@@            Coverage Diff             @@
##           master     #215      +/-   ##
==========================================
+ Coverage   92.63%   92.64%   +<.01%     
==========================================
  Files          86       92       +6     
  Lines        1072     1087      +15     
  Branches      171      165       -6     
==========================================
+ Hits          993     1007      +14     
- Misses         64       65       +1     
  Partials       15       15

Impacted Files	Coverage Δ
...iorjs-helper-get-play-score/src/getWarriorScore.js	100% <100%> (ø)
packages/warriorjs-cli/src/Profile.js	96.39% <100%> (-0.04%)	:arrow_down:
...arriorjs-helper-get-play-score/src/isFloorClear.js	100% <100%> (ø)
packages/warriorjs-cli/src/ui/printLevelReport.js	100% <100%> (ø)	:arrow_up:
...kages/warriorjs-helper-get-play-score/src/index.js	100% <100%> (ø)
...arriorjs-helper-get-play-score/src/getTurnCount.js	100% <100%> (ø)
packages/warriorjs-core/src/loadLevel.js	89.28% <100%> (ø)	:arrow_up:
...ges/warriorjs-helper-get-level-config/src/index.js	100% <100%> (ø)
...orjs-helper-get-play-score/src/getGradeForScore.js	100% <100%> (ø)
packages/warriorjs-cli/src/ui/printTowerReport.js	100% <100%> (ø)	:arrow_up:
... and 15 more

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