RNA: move most rna files to C++

Also see #103343.

Pull Request: https://projects.blender.org/blender/blender/pulls/109585

source/blender/python/intern/bpy_gizmo_wrap.c

@@ -7,7 +7,7 @@
  *
  * This file is so Python can define widget-group's that C can call into.
  * The generic callback functions for Python widget-group are defines in
- * 'rna_wm.c', some calling into functions here to do python specific
+ * 'rna_wm.cc', some calling into functions here to do python specific
  * functionality.
  *
  * \note This follows 'bpy_operator_wrap.c' very closely.

source/blender/python/intern/bpy_operator_wrap.c

@@ -7,7 +7,7 @@
  *
  * This file exposes functionality for defining to define operators that C can call into.
  * The generic callback functions for python operators are defines in
- * 'rna_wm.c', some calling into functions here to do python specific
+ * 'rna_wm.cc', some calling into functions here to do python specific
  * functionality.
  */
 

source/blender/python/intern/bpy_rna_gizmo.c

@@ -339,7 +339,7 @@ static PyObject *bpy_gizmo_target_set_handler(PyObject *UNUSED(self), PyObject *
 
   /* NOTE: this is a counter-part to functions:
    * 'Gizmo.target_set_prop & target_set_operator'
-   * (see: rna_wm_gizmo_api.c). conventions should match. */
+   * (see: rna_wm_gizmo_api.cc). conventions should match. */
   static const char *const _keywords[] = {"self", "target", "get", "set", "range", NULL};
   static _PyArg_Parser _parser = {
       "O&" /* `self` */

source/blender/python/intern/bpy_rna_types_capi.c

@@ -8,7 +8,7 @@
  * This file extends RNA types from `bpy.types` with C/Python API methods and attributes.
  *
  * We should avoid adding code here, and prefer:
- * - `source/blender/makesrna/intern/rna_context.c` using the RNA C API.
+ * - `source/blender/makesrna/intern/rna_context.cc` using the RNA C API.
  * - `scripts/modules/bpy_types.py` when additions c an be written in Python.
  *
  * Otherwise functions can be added here as a last resort.