This task serves as the glue between T358917 and T358920. It prepares the wikitext for Preview to accept.

1. Ensure article section 0 wikitext is passed into T358917. This should already be returned in the main image recommendations combined API call - we just need to make sure it is passed through Codable into the image recommendation models.
2. After the user taps next in T358917, we need to get it's image wikitext output and use the utility created in T356819 to inject the image wikitext into the article wikitext from step 1.
3. Then pass the resulting article wikitext from previous step into the EditPreview view in T358920.