Make most major changes for an updated chat UI (#843)

- Updated references panel
- Use subtle coloring for chat cards
- Chat streaming with train of thought
- Side panel with limited sessions, expandable
- Manage conversation file filters easily from the side panel
- Updated nav menu, easily go to agents/automations/profile
- Upload data from the chat UI (on click attachment icon)
- Slash command pop-up menu, scrollable and selectable
- Dark mode-enabled
- Mostly mobile friendly

src/interface/web/app/agents/page.tsx

@@ -96,7 +96,7 @@ function AgentModal(props: AgentModalProps) {
                                 props.setShowModal(false);
                                 }}>
                                 <Image
-                                        src="Close.svg"
+                                        src="close.svg"
                                         alt="Close"
                                         width={24}
                                         height={24} />