refactor: extract reaction functions

[mydearxym]

• extract collect functions
• extract upvotes functions

[codecov]

Codecov Report

Merging #354 (cd570b5) into dev (143d51b) will decrease coverage by 0.09%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##              dev     #354      +/-   ##
==========================================
- Coverage   88.72%   88.63%   -0.10%     
==========================================
  Files          98       97       -1     
  Lines        1242     1214      -28     
==========================================
- Hits         1102     1076      -26     
+ Misses        140      138       -2     

Impacted Files	Coverage Δ
lib/groupher_server/cms/cms.ex	97.56% <66.66%> (ø)

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