feat(core): Add support to import/export tags (#3130)

* Export and Import Workflow Tags

Support exporting and importing tags of workflows via frontend and cli.

On export, all tag data is included in the json.
- id
- name
- updatedAt
- createdAt

When importing a workflow json to n8n we:
- first check if a tag with the same id and createdAt date exists in the
  database, then we can assume the tag is identical. Changes on the name
  of the tag are now preserved.
- check if a tag with the same name exists on the database.
- create a new tag with the given name.

* clean up fe export

* remove usage count

* return updatedat, createdat

* fix tags import

* move logic from workflow package

* refactor import

* check for tags before import

* update checks on type

* fix on import

* fix build issues

* fix type issue

* remove unnessary ?

* update tag helpers so only name is required

* fix tag import

* add don't replace existing tags

* fix build issue

* address comments

* fix with promise.all

* update setting tags

* update check

* fix existing check

* add helper

* fix duplication

* fix multiple same tags bug

* fix db bugs

* add more validation on workflow type

* fix validation

* disable importing tags on copy paste

Co-authored-by: Luca Berneking <l.berneking@mittwald.de>

packages/editor-ui/src/components/MainSidebar.vue

@@ -511,10 +511,21 @@ export default mixins(
 					if (data.id && typeof data.id === 'string') {
 						data.id = parseInt(data.id, 10);
 					}
-					const blob = new Blob([JSON.stringify(data, null, 2)], {
+
+					const exportData: IWorkflowDataUpdate = {
+						...data,
+						tags: (tags || []).map(tagId => {
+							const {usageCount, ...tag} = this.$store.getters["tags/getTagById"](tagId);
+
+							return tag;
+						}),
+					};
+
+					const blob = new Blob([JSON.stringify(exportData, null, 2)], {
 						type: 'application/json;charset=utf-8',
 					});
 
+
 					let workflowName = this.$store.getters.workflowName || 'unsaved_workflow';
 
 					workflowName = workflowName.replace(/[^a-z0-9]/gi, '_');