ENH: new filament group algorithm

1.When n<10, calc all case cost
2.When n>10, first k-medoids algorithm first
3.Enable setting group size

jira:NEW

Signed-off-by: xun.zhang <xun.zhang@bambulab.com>
Change-Id: I625f47e0235c70e440c6d489b052a156fbffca3f
(cherry picked from commit 9ec276d3d7114fff7a33213c3b47ce88df85f2ee)

src/libslic3r/CMakeLists.txt

@@ -453,6 +453,8 @@ set(lisbslic3r_sources
     calib.cpp
     GCode/Thumbnails.cpp
     GCode/Thumbnails.hpp
+    FilamentGroup.hpp
+    FilamentGroup.cpp
 )
 
 if (APPLE)