build: bump python version to 3.14

[CyanVoxel]

Summary

Bumps the minimum Python version for the project from 3.12 to 3.14

• Bumps any packages that need to be bumped along with this
• Includes all actions and documentation
• Applies a linting and formatting pass using 3.14 as the new rules target

A note on older macOS versions

As far as I can tell, the only reason to keep around support for an older minimum Python version for this project would be to allow support for manually installing TagStudio on older macOS versions, specifically 10.13-10.14, since Python 3.14 raises the minimum macOS version requirement to 10.15. However, in practice this is nullified due to PySide 6's wheels only supporting a minimum of macOS 12, effectively making that are minimum targeted macOS version and superseding any of Python's own minimum supported macOS versions.

Tasks Completed

All currently shipped build configurations have been tested.

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