Added error wrapper

[bajam-genetec]

Description

• I created an error wrapper in this repository to enable access from the pion/turn repository and my project.
• These changes are based on the conversation of this PR.

Reference issue

Fixes pion/turn#467

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.83%. Comparing base (67c546f) to head (1dd1957).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #252      +/-   ##
==========================================
+ Coverage   64.94%   65.83%   +0.88%     
==========================================
  Files          27       27              
  Lines        2636     2072     -564     
==========================================
- Hits         1712     1364     -348     
+ Misses        913      697     -216     
  Partials       11       11              

Flag	Coverage Δ
go	65.83% <100.00%> (+0.88%)	⬆️

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[rg0now]

Maybe we should have called the error wrapper simply Error instead of TurnError. Turn looks a bit weird in the context of STUN plus we're going to import this as stun.Error anyway (stun.TurnError looks a bit weird on the caller side). Not that it matters that much

[JoeTurki]

Maybe we should have called the error wrapper simply Error instead of TurnError. Turn looks a bit weird in the context of STUN plus we're going to import this as stun.Error anyway (stun.TurnError looks a bit weird on the caller side). Not that it matters that much

I thought about this, but I kinda like that this API gives a story for why it was there, and why it's used. it makes code more human IMO. It's currently only used by turn.

But i'm 50/50 on this If you think we should rename it, we can alias, deprecate it. or even remove it since no one probably ever used it 🤔