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/get-current-time.js

@@ -1,10 +1,26 @@
 // this script will get current time
 
-export default function getCurrentTime() {
+function getCurrentTime() {
     return {
         data: {
             datetime: new Date().toISOString(),
             processId: "1234"
         }
     }
-}
+}
+
+getCurrentTime.meta = {
+  description: "Return the current time as ctx.data.datetime",
+  config: {},
+  input: {},
+  output: {
+    datetime: { type: "string", description: "ISO timestamp" },
+    processId: { type: "string" },
+  },
+  example: {
+    data: {},
+    config: {},
+  },
+};
+
+export default getCurrentTime;