Llm UI demo

[jnduli]

Description

Add UI that will show the results from LLM search.

Changes include:

• UI element for the LLM search section
• Route changes to support GET request for gnqna
• Async ajax calls to fetch LLM search section

Here's a screenshot for the page:

Base page:

After clicking AI Search:

Note: this is hidden behind a flag for the moment. To view this, you'll have to set AI_SEARCH_ENABLED = True in your settings config.

[Alexanderlacuna]

LGTM!