feat: addsendNoContent utility to create a 204 response

[tobiasdiez]

Adds a little helper method to immediately end the response without sending any data.

Note sure about the naming, but otherwise ready to be review.

[codecov]

Codecov Report

Merging #250 (b0de4bf) into main (4e52381) will decrease coverage by 0.19%.
The diff coverage is 56.25%.

❗ Current head b0de4bf differs from pull request most recent head b697c77. Consider uploading reports for the commit b697c77 to get more accurate results

@@            Coverage Diff             @@
##             main     #250      +/-   ##
==========================================
- Coverage   75.84%   75.64%   -0.20%     
==========================================
  Files          21       20       -1     
  Lines        1681     1232     -449     
  Branches      273      224      -49     
==========================================
- Hits         1275      932     -343     
+ Misses        406      300     -106     

Impacted Files	Coverage Δ
src/utils/response.ts	61.11% <56.25%> (+4.63%)	⬆️
src/utils/cache.ts	30.61% <0.00%> (-4.01%)	⬇️
src/app.ts	93.05% <0.00%> (-1.17%)	⬇️
src/utils/request.ts	98.55% <0.00%> (-0.29%)	⬇️
src/types.ts	100.00% <0.00%> (ø)
src/utils/multipart.ts
src/utils/proxy.ts	86.02% <0.00%> (+0.04%)	⬆️
src/utils/body.ts	83.78% <0.00%> (+0.31%)	⬆️
src/node.ts	85.18% <0.00%> (+0.36%)	⬆️
src/router.ts	94.73% <0.00%> (+0.47%)	⬆️
... and 8 more

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[pi0]

Thanks!