feat: implement database setup, logging, and workflow management

- Added database configuration and migration setup using Knex.
- Implemented a logging system with Pino, including log persistence and flushing.
- Created a server runner with Fastify, integrating authentication and various API routes.
- Introduced a script sandbox for executing user-defined scripts with restricted access.
- Established initial workflows and scripts for manual and cron triggers.
- Included documentation for API endpoints and workflows.

packages/server/workflows/default/cron-example.yaml

@@ -0,0 +1,10 @@
+name: cron example
+description: |
+  this workflow triggered by cron
+scripts:
+  - script: ntfy.js
+    config:
+      url: https://ntfy.sh/scrunner
+triggers:
+  - type: cron
+    schedule: "*/20 * * * *"