Style: Enforce separation line between function definitions

I couldn't find a tool that enforces it, so I went the manual route:
```
find -name "thirdparty" -prune \
  -o -name "*.cpp" -o -name "*.h" -o -name "*.m" -o -name "*.mm" \
  -o -name "*.glsl" > files
perl -0777 -pi -e 's/\n}\n([^#])/\n}\n\n\1/g' $(cat files)
misc/scripts/fix_style.sh -c
```

This adds a newline after all `}` on the first column, unless they
are followed by `#` (typically `#endif`). This leads to having lots
of places with two lines between function/class definitions, but
clang-format then fixes it as we enforce max one line of separation.

This doesn't fix potential occurrences of function definitions which
are indented (e.g. for a helper class defined in a .cpp), but it's
better than nothing. Also can't be made to run easily on CI/hooks so
we'll have to be careful with new code.

Part of #33027.

1 files changed, 2 insertions, 0 deletions

diff --git a/editor/plugins/path_3d_editor_plugin.cpp b/editor/plugins/path_3d_editor_plugin.cpp
index 0ed7995914..0aee064c41 100644
--- a/editor/plugins/path_3d_editor_plugin.cpp
+++ b/editor/plugins/path_3d_editor_plugin.cpp
@@ -55,6 +55,7 @@ String Path3DGizmo::get_handle_name(int p_idx) const {
 
 	return n;
 }
+
 Variant Path3DGizmo::get_handle_value(int p_idx) {
 	Ref<Curve3D> c = path->get_curve();
 	if (c.is_null())
@@ -80,6 +81,7 @@ Variant Path3DGizmo::get_handle_value(int p_idx) {
 
 	return ofs;
 }
+
 void Path3DGizmo::set_handle(int p_idx, Camera3D *p_camera, const Point2 &p_point) {
 	Ref<Curve3D> c = path->get_curve();
 	if (c.is_null())