refactor(scripts): remove admin role checks from plugin API endpoints

- Eliminated admin role checks from the create, install, and delete plugin API endpoints to simplify access control.
- Updated the ScriptsPage component to remove unnecessary user role checks, streamlining the installation process for all users.
- Improved UI by consolidating the zip installation button, enhancing user experience during plugin management.

packages/server/src/api/scripts.js

@@ -466,7 +466,6 @@ export default function scriptsPluginFactory(registry) {
 
     fastify.post(
       "/plugins/create",
-      { onRequest: [fastify.requireAdmin] },
       async (req, reply) => {
         const body = /** @type {{ id?: string, content?: string, description?: string }} */ (
           req.body ?? {}
@@ -498,7 +497,6 @@ export default function scriptsPluginFactory(registry) {
 
     fastify.post(
       "/plugins/install",
-      { onRequest: [fastify.requireAdmin] },
       async (req, reply) => {
         const body = /** @type {{
           source?: string,
@@ -573,7 +571,6 @@ export default function scriptsPluginFactory(registry) {
 
     fastify.delete(
       "/plugins/:id",
-      { onRequest: [fastify.requireAdmin] },
       async (req, reply) => {
         const { id } = /** @type {{ id: string }} */ (req.params);
         try {