remove jssha and add bcrypt for password hashing with salt

src/routes/(angemeldet)/user-management/+page.svelte

@@ -45,8 +45,7 @@
 		}
 
 		const URL = '/api/users';
-		const hashedUserPassword = new jsSHA('SHA-512', 'TEXT').update(userPassword).getHash('HEX');
-		const userData = { userName: userName, userPassword: hashedUserPassword };
+		const userData = { userName: userName, userPassword: userPassword };
 
 		try {
 			const response = await fetch(URL, {