Code quality: Fix header guards consistency

Adds `header_guards.sh` bash script, used in CI to validate future
changes. Can be run locally to fix invalid header guards.

modules/gdscript/language_server/gdscript_extend_parser.h

@@ -33,7 +33,7 @@
 
 #include "../gdscript_parser.h"
 #include "core/variant/variant.h"
-#include "lsp.hpp"
+#include "godot_lsp.h"
 
 #ifndef LINE_NUMBER_TO_INDEX
 #define LINE_NUMBER_TO_INDEX(p_line) ((p_line)-1)
@@ -99,4 +99,4 @@ public:
 	Error parse(const String &p_code, const String &p_path);
 };
 
-#endif
+#endif // GDSCRIPT_EXTEND_PARSER_H

modules/gdscript/language_server/gdscript_language_protocol.h

@@ -36,7 +36,7 @@
 #include "core/io/tcp_server.h"
 #include "gdscript_text_document.h"
 #include "gdscript_workspace.h"
-#include "lsp.hpp"
+#include "godot_lsp.h"
 
 #include "modules/modules_enabled.gen.h" // For jsonrpc.
 #ifdef MODULE_JSONRPC_ENABLED

modules/gdscript/language_server/gdscript_text_document.h

@@ -33,7 +33,7 @@
 
 #include "core/io/file_access.h"
 #include "core/object/ref_counted.h"
-#include "lsp.hpp"
+#include "godot_lsp.h"
 
 class GDScriptTextDocument : public RefCounted {
 	GDCLASS(GDScriptTextDocument, RefCounted)
@@ -77,4 +77,4 @@ public:
 	GDScriptTextDocument();
 };
 
-#endif
+#endif // GDSCRIPT_TEXT_DOCUMENT_H

modules/gdscript/language_server/gdscript_workspace.h

@@ -35,7 +35,7 @@
 #include "core/variant/variant.h"
 #include "editor/editor_file_system.h"
 #include "gdscript_extend_parser.h"
-#include "lsp.hpp"
+#include "godot_lsp.h"
 
 class GDScriptWorkspace : public RefCounted {
 	GDCLASS(GDScriptWorkspace, RefCounted);
@@ -100,4 +100,4 @@ public:
 	~GDScriptWorkspace();
 };
 
-#endif
+#endif // GDSCRIPT_WORKSPACE_H

modules/gdscript/language_server/godot_lsp.h

@@ -1,5 +1,5 @@
 /*************************************************************************/
-/*  lsp.hpp                                                              */
+/*  godot_lsp.h                                                          */
 /*************************************************************************/
 /*                       This file is part of:                           */
 /*                           GODOT ENGINE                                */
@@ -1975,4 +1975,4 @@ static String marked_documentation(const String &p_bbcode) {
 }
 } // namespace lsp
 
-#endif
+#endif // GODOT_LSP_H