style: auto-format example files with lux fmt

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

examples/test_fbip_clean.lux

@@ -1,5 +1,4 @@
 fn main(): Unit = {
-    // Test FBIP without string operations
     let nums = [1, 2, 3, 4, 5]
     let doubled = List.map(nums, fn(x: Int): Int => x * 2)
     let filtered = List.filter(doubled, fn(x: Int): Bool => x > 4)