feat: add tag pinning

[purpletennisball]

Summary

Add the ability to pin tags to the top of the list. Closes #542

Tasks Completed

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

[CyanVoxel]

This PR conflicts with #1456 and #1461 (built off of #1451 + #1454).

#542 is fairly old and hasn't had any new discussion in almost 2 years, and isn't an authoritative source on how this feature should be implemented if that was the intention. Pinned tags are described on the roadmap under the "Toggleable Persistent Tagging Panel" feature last estimated for v9.8.x. This panel was also mentioned recently in #1451 as a prerequisite for further ongoing UI refactors (as announced in #1460).

All that is to say that right now is not a good time to be implementing this feature due to other open PRs heavily refactoring these specific areas. Furthermore, the implementation should be on the UI side and not be a property on tags.

In the future, please check-in either on a relevant issue or the discord if there's been no recent discussion on a feature request or a specific implementation regarding a requested feature or roadmap item. The Contribution Guidelines go more in-depth on this.

[purpletennisball]

Yeah that's all fair I was going to ask about it but I had already finished coding so I just PR'd anyway but next time I'll ask 👍