chore(deps): update pnpm version and clean up package.json; remove unused dependencies and scripts

- Updated package manager to pnpm@11.22.0 in package.json.
- Removed unused dependencies and scripts from package.json and pnpm-lock.yaml.
- Cleaned up fs-store.js and other files by removing commented-out code and unused imports.
- Updated workflow configurations to use environment variables for URLs.

packages/server/plugin-install.js

@@ -8,7 +8,6 @@ import {
   installPluginFromDirectory,
   pluginDir,
 } from "./plugin-store.js";
-import { readManifestFile } from "./plugin-manifest.js";
 
 const execFileAsync = promisify(execFile);
 
@@ -214,5 +213,3 @@ export function ensureExampleInstalled(exampleId) {
   });
   return { ...installed, already: false };
 }
-
-void readManifestFile;