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/scene/resources/mesh_library.cpp b/scene/resources/mesh_library.cpp
index c0615d9b29..0f2fd939ec 100644
--- a/scene/resources/mesh_library.cpp
+++ b/scene/resources/mesh_library.cpp
@@ -190,6 +190,7 @@ Ref<Texture2D> MeshLibrary::get_item_preview(int p_item) const {
 bool MeshLibrary::has_item(int p_item) const {
 	return item_map.has(p_item);
 }
+
 void MeshLibrary::remove_item(int p_item) {
 	ERR_FAIL_COND_MSG(!item_map.has(p_item), "Requested for nonexistent MeshLibrary item '" + itos(p_item) + "'.");
 	item_map.erase(p_item);
@@ -282,5 +283,6 @@ void MeshLibrary::_bind_methods() {
 
 MeshLibrary::MeshLibrary() {
 }
+
 MeshLibrary::~MeshLibrary() {
 }