fix: add basic ErrorController

[stefanorosanelli]

This PR introduces a new ErrorController to the MyApp\Controller namespace

This will make sure the right controller is created when an exception like ExpiredTokenException is thrown

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (ac6f4c7) to head (8fed77d).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##              master       #41   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity         3         3           
===========================================
  Files              1         1           
  Lines             11        11           
===========================================
  Hits              11        11           

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