Add open option to admin plugin config

medusa-config.js

@@ -47,6 +47,9 @@ const plugins = [
     /** @type {import('@medusajs/admin').PluginOptions} */
     options: {
       autoRebuild: true,
+      develop: {
+        open: process.env.OPEN_BROWSER !== "false",
+      },
     },
   },
 ];