Fix: Resolve 500 error by building package assets in Docker

- Added missing dependencies to root package.json for sub-package builds.
- Renamed Admin/tailwind.config.js to .cjs to fix ESM/CJS build conflict.
- Updated Dockerfile to run Vite build for Admin, Installer, and WebForm packages.

packages/Webkul/Admin/tailwind.config.cjs

@@ -0,0 +1,49 @@
+/** @type {import('tailwindcss').Config} */
+module.exports = {
+    content: ["./src/Resources/**/*.blade.php", "./src/Resources/**/*.js"],
+
+    theme: {
+        container: {
+            center: true,
+
+            screens: {
+                "4xl": "1920px",
+            },
+
+            padding: {
+                DEFAULT: "16px",
+            },
+        },
+
+        screens: {
+            sm: "525px",
+            md: "768px",
+            lg: "1024px",
+            xl: "1240px",
+            "2xl": "1440px",
+            "3xl": "1680px",
+            "4xl": "1920px",
+        },
+
+        extend: {
+            colors: {
+                brandColor: "var(--brand-color)",
+            },
+
+            fontFamily: {
+                inter: ['Inter'],
+                icon: ['icomoon']
+            }
+        },
+    },
+    
+    darkMode: 'class',
+
+    plugins: [],
+
+    safelist: [
+        {
+            pattern: /icon-/,
+        }
+    ]
+};