feat(server): enhance workflow step execution and JSONata integration

- Refactored step execution logic to introduce runCompiledStep for improved clarity and functionality.
- Added support for "set" steps, allowing context manipulation using JSONata expressions.
- Implemented evaluateJsonata and isJsonataTruthy functions for evaluating conditions and expressions.
- Updated workflow parsing to handle new step types and validation rules.
- Enhanced logging and error handling for skipped steps and invalid configurations.
- Modified UI components to reflect new step types and statuses, including "skipped".

packages/server/src/api/workflows.js

@@ -26,7 +26,8 @@ function scriptNames(workflow) {
   const names = [];
   for (const raw of workflow.scripts ?? []) {
     try {
-      names.push(parseScriptStep(raw).script);
+      const parsed = parseScriptStep(raw);
+      names.push(parsed.kind === "set" ? `set:${parsed.as}` : parsed.script);
     } catch {
       names.push(null);
     }