feat(api): add user info GET endpoint and blocklist usernames

src/lib/validation/user.ts

@@ -23,7 +23,7 @@ export const userNameSchema = zod
     /^[a-zA-Z0-9_]+$/,
     'Username can only contain letters, numbers, and underscores',
   );
-  
+
 export const loginSchema = zod.object({
   email: userEmailSchema.or(userNameSchema),
   password: zod.string().min(1, 'Password is required'),
@@ -60,3 +60,5 @@ export const registerSchema = zod
       path: ['password'],
     },
   );
+
+export const disallowedUsernames = ['me', 'admin', 'search'];