feat: port thumbnail (#390) and related features to v9.5 (#522)

* feat: port v9.4 thumbnail + related feats to v9.5

Ports the following thumbnail and related PRs from the `Alpha-v9.4` branch to `main` (v9.5+):
- (#273) Blender thumbnail support
- (#307) Add font thumbnail preview support
- (#331) refactor: move type constants to new media classes
- (#390) feat(ui): expanded thumbnail and preview features
- (#370) ui: "open in explorer" action follows os name
- (#373) feat(ui): preview support for source engine files
- (#274) Refactor video_player.py (Fix #270)
- (#430) feat(ui): show file creation/modified dates + restyle path label
- (#471) fix(ui): use default audio icon if ffmpeg is absent
- (#472) fix(ui): use birthtime for creation time on mac & win

Co-Authored-By: Ethnogeny <111099761+050011-code@users.noreply.github.com>
Co-Authored-By: Theasacraft <91694323+Thesacraft@users.noreply.github.com>
Co-Authored-By: SupKittyMeow <77246128+supkittymeow@users.noreply.github.com>
Co-Authored-By: EJ Stinson <93455158+favroitegamers@users.noreply.github.com>
Co-Authored-By: Sean Krueger <71362472+seakrueger@users.noreply.github.com>

* remove vscode exceptions from `.gitignore`

* delete .vscode directory

* style: format for `ruff check`

* fix(tests): update `test_update_widgets_not_selected` test

* remove Send2Trash dependency

* refactor: use dataclass for MediaCateogry

* refactor: use enums for UI colors

* docs: add file docstring for silent_Popen

* refactor: replace logger with structlog

* use early return inside `ResourceManager.get()`

* add `is_ext_in_category()` method to `MediaCategory`

Add method to check if an extension is a member of a given MediaCategory.

* style: fix docstring style, missing type hints, rename `afm`

* fix: use structlog vars in logging

* refactor: move platform-dependent strings to PlatformStrings

* refactor: move `parents[2]` path to variable

* fix: undo logger regressions

---------

Co-authored-by: Ethnogeny <111099761+050011-code@users.noreply.github.com>
Co-authored-by: Theasacraft <91694323+Thesacraft@users.noreply.github.com>
Co-authored-by: SupKittyMeow <77246128+supkittymeow@users.noreply.github.com>
Co-authored-by: EJ Stinson <93455158+favroitegamers@users.noreply.github.com>
Co-authored-by: Sean Krueger <71362472+seakrueger@users.noreply.github.com>

pyproject.toml

@@ -4,6 +4,7 @@ line-length = 100
 
 [tool.ruff.lint.per-file-ignores]
 "tagstudio/tests/**" = ["D", "E402"]
+"tagstudio/src/qt/helpers/vendored/**" = ["B", "E", "N", "UP", "SIM115"]
 
 [tool.ruff.lint.pydocstyle]
 convention = "google"