chore(deps): update tailwind packages to v4.0.5 (#3628)

* chore(deps): update tailwind packages to v4.0.5

* Add css files to source usage scanning

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Hugo van Rijswijk <git@hugovr.nl>

Author: renovate[bot]

package-lock.json

@@ -49,7 +49,7 @@
     "@lit-labs/observers": "2.0.4",
     "@playwright/test": "1.50.1",
     "@tailwindcss/forms": "0.5.10",
-    "@tailwindcss/vite": "4.0.4",
+    "@tailwindcss/vite": "4.0.5",
     "@types/prismjs": "1.26.5",
     "@vitest/browser": "3.0.5",
     "browserslist-to-esbuild": "2.1.1",
@@ -65,7 +65,7 @@
     "prism-svelte": "0.5.0",
     "prismjs": "1.29.0",
     "rxjs": "7.8.1",
-    "tailwindcss": "4.0.4",
+    "tailwindcss": "4.0.5",
     "vite": "6.1.0",
     "vitest": "3.0.5"
   }

packages/elements/package.json

@@ -5,17 +5,16 @@
 @import 'tailwindcss';
 @plugin "@tailwindcss/forms";
 
+/* Include these css files for class (and css variable) usage scanning */
+@source "../components/**/*.css";
+
 @theme {
   --breakpoint-3xl: 2000px;
 
   --transition-property-max-width: max-width;
   --transition-property-height: height;
   --transition-property-width: width;
   --transition-property-stroke-opacity: stroke-opacity;
-
-  /* Remove some unused colours */
-  --color-stone-*: initial;
-  --color-slate-*: initial;
 }
 
 @theme inline {