Add pm2 helper scripts and README

pm2/README.md

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+# PM2 Helpers
+
+Utility scripts for managing PM2 process groups across multiple projects.
+
+## Files
+
+- **`pm2-manager.sh`** — Interactive CLI for managing all PM2 services discovered under the parent directory. Supports `list`, `recreate`, `reload`, `restart`, and `delete` actions. Operates on `ecosystem.config.cjs` and `ecosystem.cron.config.js` files found at depth 2.
+
+- **`pm2-recreate.sh`** — Simple one-shot script to delete and re-create a single PM2 app from its ecosystem file. Useful for picking up `.env` or config changes.
+
+## Usage
+
+```bash
+# Interactive mode
+./pm2-manager.sh
+
+# List discovered services
+./pm2-manager.sh list
+
+# Run action by index or name
+./pm2-manager.sh restart 1
+./pm2-manager.sh reload zap
+
+# Recreate a single app
+./pm2-recreate.sh /path/to/project app-name ecosystem.config.cjs
+```
+
+## Conventions
+
+Both scripts look for project directories with `ecosystem.config.cjs` (or `ecosystem.cron.config.js`) one level below the workspace root. App names are extracted from the ecosystem file's `name` field, falling back to the directory name.