feat(plugin): use @decky/rollup for build config

plugins/decky-vault/rollup.config.js

@@ -1,20 +1,5 @@
-import typescript from "@rollup/plugin-typescript"
-import commonjs from "@rollup/plugin-commonjs"
+import deckyPlugin from "@decky/rollup";
 
-export default {
-  input: "src/index.tsx",
-  output: {
-    file: "dist/index.js",
-    format: "esm",
-    sourcemap: false,
-  },
-  plugins: [
-    typescript(),
-    commonjs(),
-  ],
-  external: [
-    "react",
-    "react-dom",
-    "@deckyvault/shared",
-  ],
-}
+export default deckyPlugin({
+  // Add extra rollup options here if needed
+});