feat(editor): Add template Id to workflow metadata (#8088)

## Summary
Adding a link between the workflow and the template it originated from
by saving `templateId` in the workflow metadata

## Related tickets and issues
ADO-1537

## Review / Merge checklist
- [x] PR title and summary are descriptive. **Remember, the title
automatically goes into the changelog. Use `(no-changelog)` otherwise.**
([conventions](https://github.com/n8n-io/n8n/blob/master/.github/pull_request_title_conventions.md))
- [ ] [Docs updated](https://github.com/n8n-io/n8n-docs) or follow-up
ticket created.
- [x] Tests included.
> A bug is not considered fixed, unless a test is added to prevent it
from happening again.
   > A feature is not complete without tests.

packages/editor-ui/src/stores/workflows.store.ts

@@ -32,6 +32,7 @@ import type {
 	IWorkflowsMap,
 	WorkflowsState,
 	NodeMetadataMap,
+	WorkflowMetadata,
 } from '@/Interface';
 import { defineStore } from 'pinia';
 import type {
@@ -656,6 +657,17 @@ export const useWorkflowsStore = defineStore(STORES.WORKFLOWS, {
 			};
 		},
 
+		setWorkflowMetadata(metadata: WorkflowMetadata | undefined): void {
+			this.workflow.meta = metadata;
+		},
+
+		addToWorkflowMetadata(data: Partial<WorkflowMetadata>): void {
+			this.workflow.meta = {
+				...this.workflow.meta,
+				...data,
+			};
+		},
+
 		setWorkflow(workflow: IWorkflowDb): void {
 			this.workflow = workflow;
 			this.workflow = {