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, 5 insertions, 0 deletions

diff --git a/scene/main/node.cpp b/scene/main/node.cpp
index 0f71606c0e..4e08057577 100644
--- a/scene/main/node.cpp
+++ b/scene/main/node.cpp
@@ -1276,6 +1276,7 @@ void Node::remove_child(Node *p_child) {
 int Node::get_child_count() const {
 	return data.children.size();
 }
+
 Node *Node::get_child(int p_index) const {
 	ERR_FAIL_INDEX_V(p_index, data.children.size(), nullptr);
 
@@ -1516,6 +1517,7 @@ void Node::set_owner(Node *p_owner) {
 
 	_set_owner_nocheck(p_owner);
 }
+
 Node *Node::get_owner() const {
 	return data.owner;
 }
@@ -1685,6 +1687,7 @@ int Node::get_persistent_group_count() const {
 
 	return count;
 }
+
 void Node::_print_tree_pretty(const String &prefix, const bool last) {
 	String new_prefix = last ? String::utf8(" ┖╴") : String::utf8(" ┠╴");
 	print_line(prefix + new_prefix + String(get_name()));
@@ -1814,6 +1817,7 @@ void Node::remove_and_skip() {
 void Node::set_filename(const String &p_filename) {
 	data.filename = p_filename;
 }
+
 String Node::get_filename() const {
 	return data.filename;
 }
@@ -1821,6 +1825,7 @@ String Node::get_filename() const {
 void Node::set_editor_description(const String &p_editor_description) {
 	set_meta("_editor_description_", p_editor_description);
 }
+
 String Node::get_editor_description() const {
 	if (has_meta("_editor_description_")) {
 		return get_meta("_editor_description_");