feat(grid-lite): update styling sample to use sass theme

Author: didimmova

samples/grids/grid-lite/styling-custom-theme/package.json

@@ -16,6 +16,7 @@
   "dependencies": {
     "igniteui-grid-lite": "^0.0.1",
     "igniteui-react": "^19.4.0",
+    "igniteui-theming": "^24.0.2",
     "igniteui-webcomponents": "^6.3.0",
     "lit-html": "^3.2.0",
     "react": "^19.2.0",
@@ -30,6 +31,7 @@
     "@vitejs/plugin-react": "^5.0.4",
     "@vitest/browser": "^3.2.4",
     "eslint": "^8.33.0",
+    "sass": "^1.83.0",
     "eslint-config-react": "^1.1.7",
     "eslint-plugin-react": "^7.20.0",
     "typescript": "^4.8.4",