feat(settings): add settings pages and layout with routing

src/pages/setting/index.tsx

@@ -0,0 +1,5 @@
+export { default as ModelsSetting } from './models';
+export { default as SystemSetting } from './system';
+export { default as TeamsSetting } from './teams';
+export { default as ProfileSetting } from './profile';
+export { default as MCPSetting } from './mcp';