Allow users to create their own chatbots with custom prompts

[jared-yu-hcltech]

In the new chat page, make a clickable button for users to create their own chatbots that they can then communicate with, where they can select their own model and create prompts for it.

Goal: Users can select from the side menu to create their own chatbot. From there, they can submit a prompt which will be used as the system prompt for the LLM. The user will also be allowed to set their own LLM (e.g., gpt-4o, gemini-flash-1.5, etc.).

for gpt-4o, we can initialize the chat history with something like: role: 'system', content: 'You are a helpful assistant.' for Gemini, we can initialize it with something like user: 'You are a helpful assistant.' model: 'I understand.'

This will initialize a chat history which then is visible in the normal DashboardPage, and will continue from there. Then, if we leave the chat and come back, we need to make sure that the custom prompts are still properly in effect. We also probably will want to lock it so that the user can't change the model in the middle of the chat for these custom chatbots.

[jared-yu-hcltech]

Currently working on a high-level, but having some minor issues. Had to edit the schema to include the LLM. This impacted both old code and new code. Currently it only seems to work smoothly for gpt-4o, the Gemini version seems to not be working. Also, need to sync the Change Model buttons, we probably want to disable them in the case of it being a Custom Chatbot.

[jared-yu-hcltech]

The feature has now been largely implemented via c8f7350.

• [x] There still needs the addition of preventing users from changing the model for custom chatbots. (fixed with 77c3e29)
• [x] The chat history needs to remember if it is a custom one or not for showing the correct UI. (fixed with 77c3e29)
  • [x] Rule: if for a custom bot, we leave and come back, then it must show the same original LLM model (fixed with 77c3e29)
• [x] Seems to have broken the ability to change the model correctly also. (apparently fixed with 77c3e29)
• [x] After moving from a custom model, going back to dashboard should reset it to the default. (fixed with 77c3e29)

[jared-yu-hcltech]

Going to close for now as the feature seems largely functional and file a bug for the remaining issue.

Edit: Apparently the bug has been fixed with 77c3e29. Will not be filing a bug issue then.