fix: use if-then syntax instead of || for crane check

The || { ... } syntax was causing a syntax error with set -euo pipefail.
Changed to standard if-then-fi structure for better compatibility.

Signed-off-by: Mark Chmarny <[email protected]>

Author: mchmarny

scripts/copy-images.sh

@@ -50,10 +50,10 @@ command_exists() {
 }
 
 # Validate prerequisites
-command_exists crane || {
+if ! command_exists crane; then
     log_error "crane is not installed. Please install crane to proceed."
     exit 1
-}
+fi
 
 # Validate arguments
 if [ -z "$TARGET_REG_URI" ]; then