feat(server): enhance script execution and workflow management

- Introduced compileWorkflowScripts function to parse and validate workflow scripts, supporting both linear and DAG execution modes.
- Added runLinearSteps and runDagSteps functions for executing compiled workflows based on their structure.
- Updated createRegistry function to utilize the new workflow compilation and execution logic.
- Enhanced script sandbox with meta extraction and instantiation capabilities for better script management.
- Improved API endpoints to return script metadata and handle errors more effectively.
- Removed deprecated scripts and updated workflows to reflect new structure and functionality.

packages/server/scripts/jsonata.js

@@ -1,10 +1,27 @@
 import jsonata from "jsonata";
 
-export default function jsonataFn(ctx) {
+function jsonataFn(ctx) {
     log.info({ctx}, "jsonata: context")
     log.info("jsonata: evaluating expression %s", ctx.config.expression);
     const expression = jsonata(ctx.config.expression);
     const result = expression.evaluate(ctx.data);
     log.info({result}, "jsonata: expression result");
     return result;
-}
+}
+
+jsonataFn.meta = {
+  description: "Evaluate a JSONata expression against ctx.data and return the result as the next context",
+  config: {
+    expression: { type: "string", required: true, description: "JSONata expression" },
+  },
+  input: {},
+  output: {},
+  example: {
+    data: { title: "Hello", url: "https://example.com" },
+    config: {
+      expression: '{"data": {"title": title, "message": title, "attach": url}}',
+    },
+  },
+};
+
+export default jsonataFn;