Add boolean flag skip_router to Context

[cyangle]

Description of the Change

Allow skipping http_handler and websocket_handler by setting skip_router to true on Context

Alternate Designs

Benefits

It allows skipping router handlers from Grip pipelines.

Possible Drawbacks

[cyangle]

@grkek Please review.

[grkek]

@cyangle You can remove HTTP and WebSocket routers from the main router array

[cyangle]

@grkek This is to skip the router handlers dynamically per request.

[grkek]

I do not see a reason to include this in the framework.