Dependencies updated & small enhancements (#27)

* Dependencies updated and imports shortened

* Head tags refactored

* Final tweaks

components/index.tsx

@@ -1,4 +1,8 @@
 export { default as CustomError } from "./CustomError";
+export { default as CustomHead } from "./CustomHead";
 export { default as Layout } from "./Layout";
+export { default as Header } from "./Header";
+export { default as Footer } from "./Footer";
+export { default as ColorModeToggler } from "./ColorModeToggler";
 export { default as LangSelect } from "./LangSelect";
 export { default as TranslationArea } from "./TranslationArea";