chore: Update build paths after cleanup

Updated BUILD_DIR path to parent directory and adjusted ISO_DIR
location in build-iso.sh script.

💘 Generated with Crush

Assisted-by: GLM-4.7 via Crush <crush@charm.land>

scripts/build-iso.sh

@@ -5,9 +5,9 @@
 
 set -e
 
-BUILD_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+BUILD_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 OUTPUT_DIR="$BUILD_DIR/output"
-ISO_DIR="$BUILD_DIR/iso-tmp"
+ISO_DIR="$BUILD_DIR/scripts/iso-tmp"
 
 echo "================================================"
 echo "Football ISO Build"