Pass unquote thru add_route

[ahopkins]

Needed for fix for: sanic-org/sanic-ext#148, but we probably should be accepting this param here anyway.

[codecov]

Codecov Report

Base: 88.596% // Head: 88.640% // Increases project coverage by +0.044% 🎉

Coverage data is based on head (981b57e) compared to base (2abe66b).
Patch has no changes to coverable lines.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #2639       +/-   ##
=============================================
+ Coverage   88.596%   88.640%   +0.044%     
=============================================
  Files           82        82               
  Lines         6761      6761               
  Branches      1156      1156               
=============================================
+ Hits          5990      5993        +3     
+ Misses         531       529        -2     
+ Partials       240       239        -1     

Impacted Files	Coverage Δ
sanic/mixins/routes.py	94.881% <ø> (ø)
sanic/server/websockets/impl.py	37.557% <0.000%> (-0.231%)	⬇️
sanic/app.py	90.070% <0.000%> (+0.709%)	⬆️

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