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/cli/src/Server.ts

@@ -1241,7 +1241,7 @@ class App {
 						return TagHelpers.getTagsWithCountDb(tablePrefix);
 					}
 
-					return Db.collections.Tag.find({ select: ['id', 'name'] });
+					return Db.collections.Tag.find({ select: ['id', 'name', 'createdAt', 'updatedAt'] });
 				},
 			),
 		);