IndexHandler showing all routes

[robintemme]

I think it would be nice if IndexHandler would return all routes and endpoints, not only GET ones.
It would also be nice if they were sorted somehow (alphabetical by route maybe). I can't see an order here.

[bahlo]

I agree, let's show all routes with name and sort the index alphabetically.

This will take place in the next minor version, but feel free to contribute if you want 👍