📸 feat: Gemini vision, Improved Logs and Multi-modal Handling (#1368)

* feat: add GOOGLE_MODELS env var

* feat: add gemini vision support

* refactor(GoogleClient): adjust clientOptions handling depending on model

* fix(logger): fix redact logic and redact errors only

* fix(GoogleClient): do not allow non-multiModal messages when gemini-pro-vision is selected

* refactor(OpenAIClient): use `isVisionModel` client property to avoid calling validateVisionModel multiple times

* refactor: better debug logging by correctly traversing, redacting sensitive info, and logging condensed versions of long values

* refactor(GoogleClient): allow response errors to be thrown/caught above client handling so user receives meaningful error message
debug orderedMessages, parentMessageId, and buildMessages result

* refactor(AskController): use model from client.modelOptions.model when saving intermediate messages, which requires for the progress callback to be initialized after the client is initialized

* feat(useSSE): revert to previous model if the model was auto-switched by backend due to message attachments

* docs: update with google updates, notes about Gemini Pro Vision

* fix: redis should not be initialized without USE_REDIS and increase max listeners to 20

docs/install/dotenv.md

@@ -199,6 +199,15 @@ GOOGLE_KEY=user_provided
 GOOGLE_REVERSE_PROXY=
 ```
 
+- Customize the available models, separated by commas, **without spaces**.
+    - The first will be default.
+    - Leave it blank or commented out to use internal settings (default: all listed below).
+
+```bash
+# all available models as of 12/16/23
+GOOGLE_MODELS=gemini-pro,gemini-pro-vision,chat-bison,chat-bison-32k,codechat-bison,codechat-bison-32k,text-bison,text-bison-32k,text-unicorn,code-gecko,code-bison,code-bison-32k
+```
+
 ### OpenAI
 
 - To get your OpenAI API key, you need to: