* Add Vertex AI express mode support
Split Google AI Studio and Vertex AI
* Add support for Vertex AI, including updating default models and related settings, modifying frontend HTML to include Vertex AI options, and adjusting request processing logic in the backend API.
* Log API name in the console
* Merge sysprompt toggles back
* Use Gemma tokenizers for Vertex and LearnLM
* AI Studio parity updates
* Add link to express mode doc. Also technically it's not a form
* Split title
* Use array includes
* Add support for Google Vertex AI in image captioning feature
* Specify caption API name, add to compression list
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Co-authored-by: Cohee <18619528+Cohee1207@users.noreply.github.com>