Rename root route module

[duffn]

• Rename root route module
• Some minor cleanup

[codecov-commenter]

Codecov Report

Merging #5 (4741d97) into main (59d6a6b) will increase coverage by 0.0%.
The diff coverage is 92.3%.

@@          Coverage Diff          @@
##            main      #5   +/-   ##
=====================================
  Coverage   97.2%   97.2%           
=====================================
  Files         20      20           
  Lines        251     253    +2     
=====================================
+ Hits         244     246    +2     
  Misses         7       7           

Impacted Files	Coverage Δ
app/api/helpers.rb	80.0% <80.0%> (+5.0%)	⬆️
app/root.rb	94.1% <94.1%> (+0.3%)	⬆️
spec/api/session_spec.rb	100.0% <100.0%> (ø)
spec/api/widget_spec.rb	100.0% <100.0%> (ø)

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