fix: silence Bootstrap Sass deprecation warnings in Vite config

vite.config.js

@@ -8,6 +8,18 @@ export default defineConfig({
             refresh: true,
         }),
     ],
+    css: {
+        preprocessorOptions: {
+            scss: {
+                silenceDeprecations: [
+                    'import',
+                    'global-builtin',
+                    'color-functions',
+                    'if-function',
+                ],
+            },
+        },
+    },
     server: {
         watch: {
             ignored: ['**/storage/framework/views/**'],