style: auto-format example files with lux fmt

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

examples/modules/use_stdlib.lux

@@ -1,17 +1,9 @@
-// Example using the standard library
-import std/prelude.*
-import std/option as opt
-
 fn main(): Unit with {Console} = {
     Console.print("=== Using Standard Library ===")
-
-    // Prelude functions
     Console.print("identity(42) = " + toString(identity(42)))
     Console.print("not(true) = " + toString(not(true)))
     Console.print("and(true, false) = " + toString(and(true, false)))
     Console.print("or(true, false) = " + toString(or(true, false)))
-
-    // Option utilities
     let x = opt.some(10)
     let y = opt.none()
     Console.print("isSome(Some(10)) = " + toString(opt.isSome(x)))