Support multiple chat sessions within the web UI (#638)

* Enable support for multiple chat sessions within the web client

- Allow users to create multiple chat sessions and manage them
- Give chat session slugs based on the most recent message
- Update web UI to have a collapsible menu with active chats
- Move chat routes into a separate file

* Make the collapsible side panel more graceful, improve some styling elements of the new layout

* Support modification of the conversation title

- Add a new field to the conversation object
- Update UI to add a threedotmenu to each conversation

* Get the default conversation if a matching one is not found by id

src/interface/obsidian/src/chat_modal.ts

@@ -269,7 +269,7 @@ export class KhojChatModal extends Modal {
 
                 return false;
             } else if (responseJson.response) {
-                let chatLogs = responseJson.response;
+                let chatLogs = responseJson.response.chat;
                 chatLogs.forEach((chatLog: any) => {
                     this.renderMessageWithReferences(chatBodyEl, chatLog.message, chatLog.by, chatLog.context, new Date(chatLog.created), chatLog.intent?.type);
                 });