Improve inspect

[lefou]

• Retain the full source location relative to the project directory.
• Inherited Modules now show the full class names instead of just a short names without the package.
• In debug mode, show all inherited modules, not only the directly declared ones.
• Also show compile and runtime module dependencies
• Reworked formatting for modules to be consistent with inspect for tasks
• Added a test for inspect modules

sub(main/test/src/mill/main/MainModuleTests.scala:46)
    Sub module
 
Inherited Modules:    
    mill.define.TaskModule

Module Dependencies:
    sub.subSub

Default Task: sub.hello

Tasks (re-/defined):
    sub.hello