8723 workflow add editor in serverless function code step (#8805)

- create a serverless function when creating a new workflow code step
- add code editor in workflow code step
- move workflowVersion steps management from frontend to backend
  - add a custom resolver for workflow-version management
  - fix optimistic rendering on frontend
- fix css
- delete serverless function when deleting workflow code step

TODO
- Don't update serverlessFunction if no code change
- Factorize what can be between crud trigger and crud step
- Publish serverless version when activating workflow
- delete serverless functions when deleting workflow or workflowVersion
- fix optimistic rendering for code updates
- Unify CRUD types

<img width="1279" alt="image"
src="https://github.com/user-attachments/assets/3d97ee9f-4b96-4abc-9d36-5c0280058be4">

packages/twenty-server/src/modules/code-introspection/code-introspection.service.ts

@@ -24,15 +24,15 @@ import {
 
 @Injectable()
 export class CodeIntrospectionService {
-  public generateInputData(inputSchema: InputSchema) {
+  public generateInputData(inputSchema: InputSchema, setNullValue = false) {
     return Object.entries(inputSchema).reduce((acc, [key, value]) => {
       if (isDefined(value.enum)) {
         acc[key] = value.enum?.[0];
       } else if (['string', 'number', 'boolean'].includes(value.type)) {
-        acc[key] = generateFakeValue(value.type);
+        acc[key] = setNullValue ? null : generateFakeValue(value.type);
       } else if (value.type === 'object') {
         acc[key] = isDefined(value.properties)
-          ? this.generateInputData(value.properties)
+          ? this.generateInputData(value.properties, setNullValue)
           : {};
       } else if (value.type === 'array' && isDefined(value.items)) {
         acc[key] = [generateFakeValue(value.items.type)];