feat: integrate shadcn/ui with Tailwind v4

vite.config.ts

@@ -2,6 +2,7 @@ import { defineConfig } from "vite";
 import react from "@vitejs/plugin-react";
 import { keycloakify } from "keycloakify/vite-plugin";
 import tailwindcss from "@tailwindcss/vite";
+import path from "path";
 
 // https://vitejs.dev/config/
 export default defineConfig({
@@ -15,5 +16,10 @@ export default defineConfig({
             }
         }),
         tailwindcss()
-    ]
+    ],
+    resolve: {
+        alias: {
+            "@": path.resolve(__dirname, "./src")
+        }
+    }
 });