Allowed the (knot) launcher to give the intended namespace

[coolGi2007]

Adds a getFinalNamespace() to the QuiltLauncher allowing the knot to provide other namespaces outside of intermediary to be used. Currently, the access widener's namespace preference is hardcoded as intermediary within the RuntimeModRemapper, but with this change the value is now gotten from the launcher.

This PR also makes several functions and classes for the knot class loaders public, allowing for the creation of other knots.