Add missing copyright headers and fix formatting

Using `misc/scripts/fix_headers.py` on all Godot files.
Some missing header guards were added, and the header inclusion order
was fixed in the Bullet module.

modules/gridmap/grid_map.cpp

@@ -27,6 +27,7 @@
 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
+
 #include "grid_map.h"
 #include "message_queue.h"
 #include "scene/3d/light.h"

modules/gridmap/grid_map.h

@@ -27,6 +27,7 @@
 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
+
 #ifndef GRID_MAP_H
 #define GRID_MAP_H
 

modules/gridmap/grid_map_editor_plugin.cpp

@@ -27,6 +27,7 @@
 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
+
 #include "grid_map_editor_plugin.h"
 #include "editor/editor_scale.h"
 #include "editor/editor_settings.h"

modules/gridmap/grid_map_editor_plugin.h

@@ -27,6 +27,7 @@
 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
+
 #ifndef GRID_MAP_EDITOR_PLUGIN_H
 #define GRID_MAP_EDITOR_PLUGIN_H
 

modules/gridmap/register_types.cpp

@@ -27,6 +27,7 @@
 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
+
 #include "register_types.h"
 #ifndef _3D_DISABLED
 #include "class_db.h"

modules/gridmap/register_types.h

@@ -27,5 +27,6 @@
 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
+
 void register_gridmap_types();
 void unregister_gridmap_types();