webui: convert SketchViewModeSelect to use SketchTailwindElement with Tailwind CSS

Replace LitElement shadow DOM component with SketchTailwindElement base class
to use Tailwind CSS utility classes instead of component-scoped CSS styles.

Also adds tailwind support for CSS container queries in addition to media
queries.

Co-Authored-By: sketch <hello@sketch.dev>
Change-ID: s0eeb80dd54594375k
diff --git a/webui/package.json b/webui/package.json
index 91a1f77..c8f9861 100644
--- a/webui/package.json
+++ b/webui/package.json
@@ -28,6 +28,7 @@
   },
   "dependencies": {
     "@tailwindcss/cli": "^4.1.10",
+    "@tailwindcss/container-queries": "^0.1.1",
     "@tailwindcss/vite": "^4.1.10",
     "@xterm/addon-fit": "^0.10.0",
     "@xterm/xterm": "^5.5.0",