RIP distributive law. Hello gather/scatter

[andyscott]

This is an attempt to try out the changes suggested in recursion-schemes/recursion-schemes#51

[codecov]

Codecov Report

Merging #37 into master will decrease coverage by 3.35%.
The diff coverage is 60%.

@@            Coverage Diff             @@
##           master      #37      +/-   ##
==========================================
- Coverage      82%   78.64%   -3.36%     
==========================================
  Files          17       20       +3     
  Lines         200      206       +6     
==========================================
- Hits          164      162       -2     
- Misses         36       44       +8

Impacted Files	Coverage Δ
athema/src/main/scala/qq/athema/algebras.scala	69.56% <100%> (ø)	⬆️
modules/core/src/main/scala/qq/droste/gather.scala	100% <100%> (ø)
...s/core/src/main/scala/qq/droste/data/package.scala	66.66% <100%> (+3.03%)	⬆️
...odules/core/src/main/scala/qq/droste/scatter.scala	25% <25%> (ø)
modules/core/src/main/scala/qq/droste/zoo.scala	53.33% <53.33%> (ø)
modules/core/src/main/scala/qq/droste/scheme.scala	88.88% <66.66%> (+17.46%)	⬆️
modules/core/src/main/scala/qq/droste/dist.scala	0% <0%> (-100%)	⬇️
...s/core/src/main/scala/qq/droste/data/prelude.scala	45.45% <0%> (-36.37%)	⬇️
... and 2 more

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