Sculpt: split operators from sculpt.c to sculpt_ops.c

Except for the main brush operator, that's still in sculpt.c.

source/blender/editors/sculpt_paint/CMakeLists.txt

@@ -78,6 +78,7 @@ set(SRC
   sculpt_mask_expand.c
   sculpt_mask_init.c
   sculpt_multiplane_scrape.c
+  sculpt_ops.c
   sculpt_paint_color.c
   sculpt_pose.c
   sculpt_poly_loop.c

source/blender/editors/sculpt_paint/sculpt_intern.h

@@ -2163,3 +2163,7 @@ void SCULPT_bmesh_topology_rake(struct Sculpt *sd,
 
 void SCULPT_stroke_cache_snap_context_init(struct bContext *C, struct Object *ob);
 void SCULPT_fairing_brush_exec_fairing_for_cache(struct Sculpt *sd, struct Object *ob);
+
+/* end sculpt_brushes.c stuff */
+
+void SCULPT_OT_brush_stroke(struct wmOperatorType *ot);