feat: add SystemModelSettingModal (#127)

web/src/assets/svg/more-model.svg

web/src/hooks/commonHooks.ts

web/src/hooks/llmHooks.ts

web/src/pages/setting/model.ts

...src/pages/user-setting/components/setting-title/index.tsx

.../pages/user-setting/setting-model/api-key-modal/index.tsx

web/src/pages/user-setting/setting-model/hooks.ts

web/src/pages/user-setting/setting-model/index.less

web/src/pages/user-setting/setting-model/index.tsx

...etting/setting-model/system-model-setting-modal/index.tsx