ENH: support exclude objects for klipper printer

Thanks OrcaSlicer.

This is just function for klipper printer.
NEVER used for BBL printer.

Signed-off-by: salt.wei <salt.wei@bambulab.com>
Change-Id: I910abceb67f4dcb4260f74f5dd1b4fb614812670

src/libslic3r/GCode.hpp

@@ -195,6 +195,9 @@ public:
     void            set_layer_count(unsigned int value) { m_layer_count = value; }
     void            apply_print_config(const PrintConfig &print_config);
 
+    // SoftFever
+    std::string set_object_info(Print* print);
+
     // append full config to the given string
     static void append_full_config(const Print& print, std::string& str);