feat: add event tracker for ai chat block (#7637)

[BS-940](https://linear.app/affine-design/issue/BS-940/ai-chat-block-相关埋点)

related: https://github.com/toeverything/blocksuite/pull/7733

packages/frontend/core/src/blocksuite/presets/ai/_common/chat-actions-handle.ts

@@ -337,6 +337,15 @@ const SAVE_CHAT_TO_BLOCK_ACTION: ChatAction = {
       if (!blockId) {
         return false;
       }
+
+      rootService.telemetryService?.track('CanvasElementAdded', {
+        control: 'manually save',
+        page: 'whiteboard editor',
+        module: 'ai chat panel',
+        segment: 'right sidebar',
+        type: 'chat block',
+        category: 'root',
+      });
       return true;
     } catch (err) {
       console.error(err);

packages/frontend/core/src/blocksuite/presets/ai/peek-view/chat-block-peek-view.ts

@@ -204,6 +204,15 @@ export class AIChatBlockPeekView extends LitElement {
       source: { id: this.parentChatBlockId },
       target: { id: aiChatBlockId },
     });
+
+    edgelessService.telemetryService?.track('CanvasElementAdded', {
+      control: 'conversation',
+      page: 'whiteboard editor',
+      module: 'canvas',
+      segment: 'whiteboard',
+      type: 'chat block',
+      category: 'branch',
+    });
   };
 
   /**