Add persistent storage for directory saving setting

Introduced `DirectoryForSaving` for managing directory paths persistently. Integrated the new setting into relevant modules, ensuring the selected directory is saved and loaded across sessions.

setting/directory_for_saving.go

@@ -0,0 +1,22 @@
+package setting
+
+type DirectoryForSavingContract interface {
+	GetDirectoryForSaving() (string, error)
+	SaveDirectoryForSaving(path string) (Setting, error)
+}
+
+type DirectoryForSaving struct {
+	settingRepository RepositoryContract
+}
+
+func NewSettingDirectoryForSaving(settingRepository RepositoryContract) *DirectoryForSaving {
+	return &DirectoryForSaving{settingRepository: settingRepository}
+}
+
+func (setting DirectoryForSaving) GetDirectoryForSaving() (string, error) {
+	return setting.settingRepository.GetValue("directoryForSaving")
+}
+
+func (setting DirectoryForSaving) SaveDirectoryForSaving(path string) (Setting, error) {
+	return setting.settingRepository.CreateOrUpdate("directoryForSaving", path)
+}