Fix check_dependencies.sh exit code for optional tools

- Return 0 instead of 1 for optional tools when not found
- This prevents set -e from terminating the script
- Optional tools (gh) not found should only trigger warnings, not exit 1
- Required tools still return 1 and trigger proper error handling

Author: thc1006

scripts/check_dependencies.sh

@@ -30,12 +30,13 @@ check_command() {
             echo -e "${RED}✗${NC} $cmd: NOT FOUND (REQUIRED)"
             echo "   Install: $install_hint"
             ((ERRORS++))
+            return 1
         else
             echo -e "${YELLOW}⚠${NC} $cmd: NOT FOUND (optional)"
             echo "   Install: $install_hint"
             ((WARNINGS++))
+            return 0  # Return 0 for optional tools to not trigger set -e
         fi
-        return 1
     fi
 }