feat: upgrade to httpaux & touchstone (remove gokit metrics)

[denopink]

• upgrade to httpaux & touchstone (remove gokit metrics)
• fix linter

[codecov]

Codecov Report

Attention: Patch coverage is 65.04854% with 72 lines in your changes missing coverage. Please review.

Project coverage is 59.15%. Comparing base (4ab578a) to head (f74a2a2).
Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
control.go	0.00%	28 Missing ⚠️
primaryHandler.go	0.00%	26 Missing ⚠️
main.go	0.00%	16 Missing ⚠️
metrics.go	98.46%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #468      +/-   ##
==========================================
- Coverage   60.65%   59.15%   -1.50%     
==========================================
  Files          18       18              
  Lines        1431     1496      +65     
==========================================
+ Hits          868      885      +17     
- Misses        522      569      +47     
- Partials       41       42       +1     

Flag	Coverage Δ
unittests	59.15% <65.04%> (-1.50%)	⬇️

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