Tests: Vitest configuration cleanup (#5888)

Simplify default scripts. Filtering is still available to users, we can
revisit tagging or grouping later.
This fixes the issue where we had tests that were in the codebase but
never run because they weren't under `/src/components`

Also deletes the duplicate litegraph tests and their associated vitest
config file.

- **What**: Test cleanup

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5888-Tests-Vitest-configuration-cleanup-2806d73d36508197b800f68f0b028279)
by [Unito](https://www.unito.io)

Author: DrJKL

package.json

@@ -1,19 +1,17 @@
 {
   "name": "@comfyorg/comfyui-frontend",
   "private": true,
-  "version": "1.28.6",
+  "version": "1.28.4",
   "type": "module",
   "repository": "https://github.com/Comfy-Org/ComfyUI_frontend",
   "homepage": "https://comfy.org",
   "description": "Official front-end implementation of ComfyUI",
   "license": "GPL-3.0-only",
   "scripts": {
-    "build:desktop": "nx build @comfyorg/desktop-ui",
     "build-storybook": "storybook build",
     "build:types": "nx build --config vite.types.config.mts && node scripts/prepare-types.js",
     "build": "pnpm typecheck && nx build",
     "collect-i18n": "pnpm exec playwright test --config=playwright.i18n.config.ts",
-    "dev:desktop": "nx dev @comfyorg/desktop-ui",
     "dev:electron": "nx serve --config vite.electron.config.mts",
     "dev": "nx serve",
     "devtools:pycheck": "python3 -m compileall -q tools/devtools",
@@ -35,8 +33,6 @@
     "prepare": "husky || true && git config blame.ignoreRevsFile .git-blame-ignore-revs || true",
     "preview": "nx preview",
     "storybook": "nx storybook -p 6006",
-    "stylelint:fix": "stylelint --cache --fix",
-    "stylelint": "stylelint --cache",
     "test:browser": "pnpm exec nx e2e",
     "test:unit": "nx run test",
     "typecheck": "vue-tsc --noEmit",
@@ -81,10 +77,8 @@
     "knip": "catalog:",
     "lint-staged": "catalog:",
     "nx": "catalog:",
-    "postcss-html": "catalog:",
     "prettier": "catalog:",
     "storybook": "catalog:",
-    "stylelint": "catalog:",
     "tailwindcss": "catalog:",
     "tailwindcss-primeui": "catalog:",
     "tsx": "catalog:",