List all templates

The full list of renderable templates. For URL construction, the four load-bearing fields per template are id (goes into the path after /images/), lines (maximum number of /-separated text segments accepted in the path), overlays (number of overlay image slots the template defines), and styles (allowed values for the style= query parameter). The remaining fields are descriptive: name for display, blank for the empty-template render URL, example.url for a guaranteed-valid smoke-test URL, source for attribution, and keywords for search. Recommended client pattern: fetch this endpoint once at startup, cache, and construct URLs locally rather than per-meme.