idea: support KoaJS, add some automation

[Sefriol]

Hey @travist

I made this version couple years ago and I was wondering if you were interested.

This adds KoaJS support for resourceJS and it's written in async way with typescript. It also supports OpenAPI 3.

Express version still has a bug with swagger where it does not properly detect variables for nested path variables.

I also added inMemoryMongoDB for expressJS tests for easier setup and added github actions.

Lerna needs to be modified to support npm, but I made it so that it pushes to github's npm by default. There is some unnecessary package name and repository url changes that need to be removed.

Anyway, what do you think?