style: auto-format example files with lux fmt

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

examples/modules/main_selective.lux

@@ -1,15 +1,7 @@
-// Test selective imports
-import examples/modules/math_utils.{square, factorial}
-import examples/modules/string_utils as str
-
 fn main(): Unit with {Console} = {
     Console.print("=== Selective & Aliased Imports ===")
-
-    // Direct imports (no module prefix)
     Console.print("square(7) = " + toString(square(7)))
     Console.print("factorial(5) = " + toString(factorial(5)))
-
-    // Aliased import
     Console.print(str.greet("Lux"))
     Console.print(str.exclaim("Aliased imports work"))
 }