Add examples for multithreaded, fork server

[agauniyal]

No description provided.

[codecov]

Codecov Report

Merging #20 into develop will increase coverage by 0.04%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop      #20      +/-   ##
===========================================
+ Coverage    88.17%   88.21%   +0.04%     
===========================================
  Files           12       12              
  Lines         1116     1120       +4     
  Branches        96       95       -1     
===========================================
+ Hits           984      988       +4     
  Misses         132      132

Impacted Files	Coverage Δ
include/socket.hpp	74.12% <100%> (+0.52%)	⬆️
test/socket_bind_test.cpp	100% <100%> (ø)	⬆️

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