Add nextStepIds to trigger (#13413)

We will have floating steps in our workflow with the branch design.
Currently, a step without parent is considered linked to the trigger. We
need to distinguish the 2 cases. Thus this PR:
- add `nextStepIds` to workflowVersion.trigger
- create a command to migrate existing triggers

packages/twenty-server/src/modules/workflow/workflow-trigger/types/workflow-trigger.type.ts

@@ -16,6 +16,7 @@ type BaseTrigger = {
   name: string;
   type: WorkflowTriggerType;
   settings: BaseWorkflowTriggerSettings;
+  nextStepIds?: string[];
 };
 
 export type WorkflowDatabaseEventTrigger = BaseTrigger & {
@@ -25,11 +26,6 @@ export type WorkflowDatabaseEventTrigger = BaseTrigger & {
   };
 };
 
-export enum WorkflowManualTriggerAvailability {
-  EVERYWHERE = 'EVERYWHERE',
-  WHEN_RECORD_SELECTED = 'WHEN_RECORD_SELECTED',
-}
-
 export type WorkflowManualTrigger = BaseTrigger & {
   type: WorkflowTriggerType.MANUAL;
   settings: BaseWorkflowTriggerSettings & {
@@ -77,8 +73,6 @@ export type WorkflowWebhookTrigger = BaseTrigger & {
     );
 };
 
-export type WorkflowManualTriggerSettings = WorkflowManualTrigger['settings'];
-
 export type WorkflowTrigger =
   | WorkflowDatabaseEventTrigger
   | WorkflowManualTrigger