Updated the YAML parsing method (#3694)

Synchronized the process of loading and parsing YAML databases.
Provides more robust parse warnings/errors.
Added Header checks to validate database versions.
Adjusted root keys to a standard name of Body.
Adjusted inter-server storages, achievements, and attendance to follow the new format.

Fixes #3483

Thanks to @Lemongrass3110!

src/char/char.cpp

@@ -3208,7 +3208,7 @@ int do_init(int argc, char **argv)
 		ShowNotice("And then change the user/password to use in conf/char_athena.conf (or conf/import/char_conf.txt)\n");
 	}
 
-	inter_init_sql((argc > 2) ? argv[2] : inter_cfgName); // inter server configuration
+	inter_init_sql((argc > 2) ? argv[2] : SQL_CONF_NAME); // inter server configuration
 
 	auth_db = idb_alloc(DB_OPT_RELEASE_DATA);
 	online_char_db = idb_alloc(DB_OPT_RELEASE_DATA);