[Refactor] Refactor the way import files.

Organize some codes.

src-ui/logics/main/index.js

@@ -0,0 +1,5 @@
+export { useIsMainPageCompactMode } from "./useIsMainPageCompactMode";
+export { useLanguageSettings } from "./useLanguageSettings";
+export { useMainFunction } from "./useMainFunction";
+export { useMessageInputBoxRatio } from "./useMessageInputBoxRatio";
+export { useSelectableLanguageList } from "./useSelectableLanguageList";