Preserve 'use-client' directives during rollup

Fixes warnings thrown during rollup that 'use-client' directives
from the 'mui' package were ignored by instead preserving them.

Author: rjwills28

package-lock.json

@@ -62,6 +62,7 @@
     "rollup-plugin-dts": "^6.1.1",
     "rollup-plugin-peer-deps-external": "^2.2.4",
     "rollup-plugin-postcss": "^4.0.2",
+    "rollup-preserve-directives": "^1.1.3",
     "typescript": "^5.6.3",
     "vite": "^5.4.10",
     "vite-plugin-eslint": "^1.8.1",

package.json

@@ -5,6 +5,7 @@ import dts from "rollup-plugin-dts";
 
 import postcss from "rollup-plugin-postcss";
 import peerDepsExternal from "rollup-plugin-peer-deps-external";
+import preserveDirectives from 'rollup-preserve-directives'
 
 const config = [
   {
@@ -29,7 +30,8 @@ const config = [
         tsconfig: "./tsconfig.json",
         compilerOptions: { outDir: "dist" }
       }),
-      postcss()
+      postcss(),
+      preserveDirectives()
     ]
   },
   {