feat: add router and fix

[Tochemey]

closes #392
closes #391

[codecov]

Codecov Report

Attention: Patch coverage is 85.09317% with 24 lines in your changes missing coverage. Please review.

Project coverage is 86.47%. Comparing base (65635a6) to head (03b43ef).

Files	Patch %	Lines
router/broadcast.go	80.39%	8 Missing and 2 partials ⚠️
router/random.go	84.78%	6 Missing and 1 partial ⚠️
router/round_robin.go	84.44%	6 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #393      +/-   ##
==========================================
- Coverage   86.57%   86.47%   -0.11%     
==========================================
  Files          45       48       +3     
  Lines        3681     3822     +141     
==========================================
+ Hits         3187     3305     +118     
- Misses        351      372      +21     
- Partials      143      145       +2     

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