Curves: Support for draw tool

Adds new curves support to Draw Curve operator

@@ -0,0 +1,1211 @@
+#include "DNA_curve_types.h"

@@ -0,0 +618,4 @@
+
+static int curves_draw_exec(bContext *C, wmOperator *op)
+{
+  using namespace bke;

@@ -0,0 +650,4 @@
+  const float radius_range = cps->radius_max - cps->radius_min;
+
+  Curves *curves_id = static_cast<Curves *>(obedit->data);
+  blender::bke::CurvesGeometry &curves = curves_id->geometry.wrap();

@@ -0,0 +771,4 @@
+      MutableSpan<int> resolution = curves.resolution_for_write();
+
+      resolution[curve_index] = 12;
+      IndexRange points_of_curve = curves.points_by_curve()[curve_index];

@@ -0,0 +777,4 @@
+      MutableAttributeAccessor curves_attributes = curves.attributes_for_write();
+      SpanAttributeWriter<float> radius_attribute =
+          curves_attributes.lookup_or_add_for_write_only_span<float>("radius", ATTR_DOMAIN_POINT);
+      SpanAttributeWriter<bool> selection_attribute =

@@ -0,0 +818,4 @@
+        }
+
+        for (const auto i : IndexRange(i_start, i_end - i_start)) {
+          const int64_t corner_i = points_of_curve[corners_index[i]];

@@ -0,0 +1149,4 @@
+  return ret;
+}
+
+bool editable_curves_in_edit_mode_poll(bContext *C);

@@ -0,0 +1153,4 @@
+
+void CURVES_OT_draw(wmOperatorType *ot)
+{
+  using namespace blender::ed::curves;

@@ -0,0 +1156,4 @@
+  using namespace blender::ed::curves;
+  ot->name = "Draw Curves";
+  ot->idname = __func__;
+  ot->description = "Draw a freehand spline";

@@ -1244,6 +1244,8 @@ static void CURVES_OT_delete(wmOperatorType *ot)
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
 }
 
+void CURVES_OT_draw(wmOperatorType *ot);