feat(ecosystem): update PM2 configuration for control plane and web server

- Renamed the control process to `jflow-control` and updated the script path to `control.js`.
- Introduced a new `jflow-web` process for the production UI, serving on port 8500.
- Enhanced environment variable handling for both processes, ensuring proper port assignments.
- Updated README to reflect new process architecture and usage instructions for starting the application.

packages/server/package.json

@@ -11,6 +11,7 @@
     "start:api": "node server.js",
     "start:worker": "node worker.js",
     "start:control": "node control.js",
+    "start:web": "node web-server.js",
     "migrate": "node -e \"import('./db.js').then((m) => m.migrate().then(() => process.exit(0)))\"",
     "test:plugins": "JFLOW_PLUGINS_DIR=./data/plugins-smoke-test JFLOW_DB_PATH=./data/plugins-smoke.db node test/plugins-smoke.js",
     "test:workflow-history": "JFLOW_WORKFLOWS_DIR=./data/workflow-history-smoke JFLOW_DB_PATH=./data/workflow-history-smoke.db node test/workflow-history-smoke.js",