refactor(core): workbench (#7355)

Merge the right sidebar logic into the workbench. this can simplify our logic.

Previously we had 3 modules

* workbench
* right-sidebar (Control sidebar open&close)
* multi-tab-sidebar (Control tabs)

Now everything is managed in Workbench.

# Behavioral changes

The sidebar button is always visible and can be opened at any time.
If there is no content to display,  will be `No Selection`

![CleanShot 2024-06-28 at 14.00.41.png](https://graphite-user-uploaded-assets-prod.s3.amazonaws.com/g3jz87HxbjOJpXV3FPT7/d74b3a60-2299-452e-877e-188186fe5ee5.png)

Elements in the sidebar can now be defined as`unmountOnInactive=false`. Inactive sidebars are marked with `display: none` but not unmount, so the `ChatPanel` can always remain in the DOM and user input will be retained even if the sidebar is closed.

packages/frontend/core/src/blocksuite/presets/ai/provider.ts

@@ -2,8 +2,6 @@ import type { EditorHost } from '@blocksuite/block-std';
 import { PaymentRequiredError, UnauthorizedError } from '@blocksuite/blocks';
 import { Slot } from '@blocksuite/store';
 
-import type { ChatCards } from './chat-panel/chat-cards';
-
 export interface AIUserInfo {
   id: string;
   email: string;
@@ -72,19 +70,6 @@ export class AIProvider {
     return AIProvider.instance.toggleGeneralAIOnboarding;
   }
 
-  static genRequestChatCardsFn(params: AIChatParams) {
-    return async (chatPanel: HTMLElement) => {
-      const chatCards: ChatCards | null = await new Promise(resolve =>
-        requestAnimationFrame(() =>
-          resolve(chatPanel.querySelector('chat-cards'))
-        )
-      );
-      if (!chatCards) return;
-      if (chatCards.temporaryParams) return;
-      chatCards.temporaryParams = params;
-    };
-  }
-
   private static readonly instance = new AIProvider();
 
   static LAST_ACTION_SESSIONID = '';