Refactor mute rule create/destroy functionality into use cases

[raccube]

Closes #340

[codecov[bot]]

Codecov Report

Merging #563 (8d650bb) into main (a8c936d) will decrease coverage by 1.25%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #563      +/-   ##
==========================================
- Coverage   87.94%   86.69%   -1.26%     
==========================================
  Files         128      130       +2     
  Lines        2265     2285      +20     
==========================================
- Hits         1992     1981      -11     
- Misses        273      304      +31     

Impacted Files	Coverage Δ
app/controllers/ajax/mute_rule_controller.rb	66.66% <ø> (+0.75%)	:arrow_up:
lib/use_case/mute_rule/create.rb	0.00% <0.00%> (ø)
lib/use_case/mute_rule/destroy.rb	0.00% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update a8c936d...8d650bb. Read the comment docs.