POC for custom route patterns

[hansott]

[codecov[bot]]

Codecov Report

:x: Patch coverage is 88.42105% with 11 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
library/agent/addRouteParam.ts	84.21%	6 Missing :warning:
library/helpers/buildRouteFromURL.ts	91.89%	3 Missing :warning:
library/sources/http-server/contextFromRequest.ts	75.00%	1 Missing :warning:
...ary/sources/http-server/http2/contextFromStream.ts	50.00%	1 Missing :warning:

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