fix: pyright errors in ts_core.py

[Computerdores]

Summary

Progress towards #1061 and #1232 by fixing the errors in ts_core.py.

What was easily fixable I fixed, the rest of the errors I prevented by marking the methods with NotImplementedErrors, since there is currently no code path that calls them.

Tasks Completed

• Platforms Tested:
  • [ ] Windows x86
  • [ ] Windows ARM
  • [ ] macOS x86
  • [ ] macOS ARM
  • [ ] Linux x86
  • [ ] Linux ARM
• Tested For:
  • [ ] Basic functionality
  • [ ] PyInstaller executable