Import by ID

[FOSSforlife]

We have a searchByIdentifiers() function in "item.service.ts" that searches for a single item by mbid, artist and title, which is used to check if an item already exists in the database before adding to a user's collection.

We simply need to add an "id" parameter which will also search the item's ID, and then update the addItems() function to add the id into the searchInput if it exists.