Add custom hooks for time distance and retrieving like count

Documentation added to all custom hooks

hooks/useRedirectIfLoggedIn.ts

@@ -2,7 +2,14 @@ import UserContext from '@/contexts/userContext';
 import { useRouter } from 'next/router';
 import { useContext } from 'react';
 
-const useRedirectWhenLoggedIn = () => {
+/**
+ * Custom React hook that redirects the user to the home page if they are logged in. This
+ * hook is used to prevent logged in users from accessing the login and signup pages. Must
+ * be used under the UserContext provider.
+ *
+ * @returns {void}
+ */
+const useRedirectWhenLoggedIn = (): void => {
   const { user } = useContext(UserContext);
   const router = useRouter();