allow to chage save/load/watch path

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

options.go

@@ -31,6 +31,18 @@ func Path(path string) config.Option {
 	return config.SetOption(pathKey{}, path)
 }
 
+func LoadPath(path string) config.LoadOption {
+	return config.SetLoadOption(pathKey{}, path)
+}
+
+func SavePath(path string) config.SaveOption {
+	return config.SetSaveOption(pathKey{}, path)
+}
+
+func WatchPath(path string) config.WatchOption {
+	return config.SetWatchOption(pathKey{}, path)
+}
+
 type roleIDKey struct{}
 
 func RoleID(role string) config.Option {