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.

3 files changed, 10 insertions, 0 deletions

diff --git a/drivers/windows/dir_access_windows.cpp b/drivers/windows/dir_access_windows.cpp
index 52ba8527ab..d0f06ae4c4 100644
--- a/drivers/windows/dir_access_windows.cpp
+++ b/drivers/windows/dir_access_windows.cpp
@@ -101,9 +101,11 @@ void DirAccessWindows::list_dir_end() {
 		p->h = INVALID_HANDLE_VALUE;
 	}
 }
+
 int DirAccessWindows::get_drive_count() {
 	return drive_count;
 }
+
 String DirAccessWindows::get_drive(int p_drive) {
 	if (p_drive < 0 || p_drive >= drive_count)
 		return "";
@@ -298,6 +300,7 @@ Error DirAccessWindows::remove(String p_path) {
 	else
 		return ::_wunlink(p_path.c_str()) == 0 ? OK : FAILED;
 }
+
 /*
 
 FileType DirAccessWindows::get_file_type(const String& p_file) const {
@@ -325,6 +328,7 @@ FileType DirAccessWindows::get_file_type(const String& p_file) const {
 
 	return (attr&FILE_ATTRIBUTE_DIRECTORY)?FILE_TYPE_
 }
+
 */
 size_t DirAccessWindows::get_space_left() {
 	uint64_t bytes = 0;
diff --git a/drivers/windows/file_access_windows.cpp b/drivers/windows/file_access_windows.cpp
index b74e89e2dc..50366d0b2d 100644
--- a/drivers/windows/file_access_windows.cpp
+++ b/drivers/windows/file_access_windows.cpp
@@ -188,6 +188,7 @@ String FileAccessWindows::get_path_absolute() const {
 bool FileAccessWindows::is_open() const {
 	return (f != nullptr);
 }
+
 void FileAccessWindows::seek(size_t p_position) {
 	ERR_FAIL_COND(!f);
 	last_error = OK;
@@ -195,12 +196,14 @@ void FileAccessWindows::seek(size_t p_position) {
 		check_errors();
 	prev_op = 0;
 }
+
 void FileAccessWindows::seek_end(int64_t p_position) {
 	ERR_FAIL_COND(!f);
 	if (fseek(f, p_position, SEEK_END))
 		check_errors();
 	prev_op = 0;
 }
+
 size_t FileAccessWindows::get_position() const {
 	size_t aux_position = 0;
 	aux_position = ftell(f);
@@ -209,6 +212,7 @@ size_t FileAccessWindows::get_position() const {
 	};
 	return aux_position;
 }
+
 size_t FileAccessWindows::get_len() const {
 	ERR_FAIL_COND_V(!f, 0);
 
diff --git a/drivers/windows/thread_windows.cpp b/drivers/windows/thread_windows.cpp
index adc3a9a019..ca7d936fac 100644
--- a/drivers/windows/thread_windows.cpp
+++ b/drivers/windows/thread_windows.cpp
@@ -66,9 +66,11 @@ Thread *ThreadWindows::create_func_windows(ThreadCreateCallback p_callback, void
 
 	return tr;
 }
+
 Thread::ID ThreadWindows::get_thread_id_func_windows() {
 	return (ID)GetCurrentThreadId(); //must implement
 }
+
 void ThreadWindows::wait_to_finish_func_windows(Thread *p_thread) {
 	ThreadWindows *tp = static_cast<ThreadWindows *>(p_thread);
 	ERR_FAIL_COND(!tp);