Implement String structure and update Location/Token to use it

v0/parser.c

@@ -16,14 +16,14 @@ Module* parser_parse(TokenStream* ts) {
 	Module* module = (Module*)malloc(sizeof(Module));
 	if (module == NULL) return NULL;
 
-	module->name = (char*)malloc(t.text_length + 1);
+	module->name = (char*)malloc(t.text.length + 1);
 	if (module->name == NULL) {
 		free(module);
 		return NULL;
 	}
 
-	memcpy(module->name, t.text, t.text_length);
-	module->name[t.text_length] = '\0';
+	memcpy(module->name, t.text.data, t.text.length);
+	module->name[t.text.length] = '\0';
 
 	t = tokenstream_next(ts);
 	if (t.token != TOKEN_SEMICOLON) {