feat: add timeout callback

[chowyu12]

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 81.48148% with 5 lines in your changes missing coverage. Please review.

Project coverage is 95.08%. Comparing base (8690859) to head (e6d650d). Report is 107 commits behind head on master.

Files	Patch %	Lines
rest/server.go	25.00%	3 Missing :warning:
rest/engine.go	66.66%	2 Missing :warning:

Additional details and impacted files

Files	Coverage Δ
rest/handler/timeouthandler.go	97.56% <100.00%> (-0.25%)	:arrow_down:
rest/engine.go	98.87% <66.66%> (-1.13%)	:arrow_down:
rest/server.go	95.54% <25.00%> (-1.00%)	:arrow_down:

... and 252 files with indirect coverage changes