Ability to create custom URL template for types

**Is your feature request related to a problem? Please describe.**
I would like to add a label parameter for the Bug Report URL and create a URL for enhancement issues to add to the Ideas type.

**Describe the solution you'd like**
There's an example of overriding types in the configuration docs but the link just refers to `url`. It would be good to have an example or description of how to produce that `url` placeholder. (Or if it's impossible, for it to be made possible.)

I also noticed that the `types` section of the configuration was only present in the CLI docs so maybe any customization would also be CLI only?

**Describe alternatives you've considered**
I could manually change them (not too bad for my repo though backfilling is annoying) or I could just not do it and keep the defaults.

Thanks!