Add datachannel whip whep example

[ValorZard]

Description

Add datachannel whip whep example (probably going to add two examples, one js based and one detached pure golang example)

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 84.00%. Comparing base (7354d59) to head (8b9583c). :warning: Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3115      +/-   ##
==========================================
+ Coverage   83.99%   84.00%   +0.01%     
==========================================
  Files          80       80              
  Lines        9041     9041              
==========================================
+ Hits         7594     7595       +1     
  Misses       1025     1025              
+ Partials      422      421       -1     

Flag	Coverage Δ
go	84.00% <ø> (+0.01%)	:arrow_up:

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[ValorZard]

I give permission to any maintainers to make commits for me btw

[JoeTurki]

@ValorZard I finished your example, added somestuff like random username for users, finished broadcasting, and renamed it like we talked in discord, let me know if it's ready to merge or if there anything you would like to add :pray:

[ValorZard]

We would probably need to change the README since its no longer correct. Otherwise, looks good!

[JoeTurki]

@ValorZard i updated the readme let me know if there anything i missed or if you want to commit anything