ext.tasks.loop inheritance support

[Enegg]

Summary

Supercedes and closes #259

Fixes an issue with Loop descriptor returning Loop instance in child classes; loop decorator supports Loop subclasses

Checklist

• [ ] If code changes were made, then they have been tested
  • [ ] I have updated the documentation to reflect the changes
  • [x] I have formatted the code properly by running task lint
  • [ ] I have type-checked the code by running task pyright
• [x] This PR fixes an issue
• [x] This PR adds something new (e.g. new method or parameters)
• [ ] This PR is a breaking change (e.g. methods or parameters removed/renamed)
• [ ] This PR is not a code change (e.g. documentation, README, ...)

[onerandomusername]

This errors on import time.

[onerandomusername]

@Enegg will you be resolving the issues with this pr?

[Enegg]

Uh-oh, cannot make the .start and .restart use the ParamSpec without previously ressolving the stripping self param problem.

[onerandomusername]

Uh-oh, cannot make the .start and .restart use the ParamSpec without previously ressolving the stripping self param problem.

@shiftinv will you be fixing this?