Refactor action examples structure and imports

Moved action example files into a new 'example' directory and updated all imports accordingly. Removed the monolithic 'examples.ts' and redefined ActionExamples in OneBotAction.ts to only include common error codes. This improves code organization and maintainability.

packages/napcat-onebot/action/example/NewActionsExamples.ts

@@ -0,0 +1,10 @@
+export const NewActionsExamples = {
+  GetDoubtFriendsAddRequest: {
+    payload: { count: 10 },
+    response: [{ user_id: 123456789, nickname: '昵称', age: 20, sex: 'male', reason: '申请理由', flag: 'flag_123' }],
+  },
+  SetDoubtFriendsAddRequest: {
+    payload: { flag: 'flag_123', approve: true },
+    response: {},
+  },
+};