Reduce compile times by extracting headers

Break the most expensive header include chains that contaminate the
largest number of translation units

New lightweight headers for extractdded types:
font_metrics.h, mouse_drag_action.h, board_project_settings_params.h,
common_settings_internals.h, wx_infobar_message_type.h,
zone_layer_properties_grid.h

pcbnew/python/scripting/pcbnew_scripting_helpers.cpp

@@ -35,6 +35,7 @@
 #include <action_plugin.h>
 #include <board.h>
 #include <board_design_settings.h>
+#include <settings/common_settings.h>
 #include <pcb_marker.h>
 #include <cstdlib>
 #include <drawing_sheet/ds_data_model.h>
@@ -48,6 +49,7 @@
 #include <macros.h>
 #include <pcbnew_scripting_helpers.h>
 #include <pgm_base.h>
+#include <settings/common_settings.h>
 #include <project.h>
 #include <project_pcb.h>
 #include <project/net_settings.h>