New GDScript tokenizer and parser

Sometimes to fix something you have to break it first.

This get GDScript mostly working with the new tokenizer and parser but
a lot of things isn't working yet. It compiles and it's usable, and that
should be enough for now.

Don't worry: other huge commits will come after this.

modules/gdscript/language_server/gdscript_text_document.cpp

@@ -38,6 +38,9 @@
 #include "gdscript_language_protocol.h"
 #include "servers/display_server.h"
 
+// FIXME: Reenable LSP.
+#if 0
+
 void GDScriptTextDocument::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("didOpen"), &GDScriptTextDocument::didOpen);
 	ClassDB::bind_method(D_METHOD("didChange"), &GDScriptTextDocument::didChange);
@@ -437,3 +440,5 @@ Array GDScriptTextDocument::find_symbols(const lsp::TextDocumentPositionParams &
 	}
 	return arr;
 }
+
+#endif