Documentation: Please add the junction between internal component and component information

### Configuration Issue:

I want to use the "Internal Components" feature. With the [documentation of "Internal Components"](https://docs.dependencytrack.org/datasources/internal-components/) I was not able to know if the "Component namespace regex" works on

- Components Coordinates,
- Components PURL,
- Components CPE,
- Components SWID Tag ID, or
- Components Hash.

Ok, Hash make no sense. I guess it is the PURL, but that is not mentioned in the documentation.

I hope someone with more knowledge can just add this to the documentation to help the users outside.