[PRE-RELEASE-0.4] Test all templates

[blythed]

Goal: make sure that the templates work, and add "meaningful" options (previously in "tabs") as options via ModelRouter
or otherwise.

• rag @blythed
• text-search @blythed
• image-search @kartik4949
• video-search @kartik4949
• transfer learning @kartik4949
• llm-finetuning @jieguangzhou

Something to take care of: the output_table should get saved. We may need to fix this.

[blythed]

Error found in the transfer learning template:

#2421

This error is likely to affect all training.

[kartik4949]

Working on transfer learning #2541