refactor message with clap derive api (part 1)

src/folder/arg/name.rs

@@ -16,3 +16,19 @@ pub struct FolderNameOptionalArg {
     #[arg(name = "folder-name", value_name = "FOLDER", default_value = DEFAULT_INBOX_FOLDER)]
     pub name: String,
 }
+
+/// The source folder name argument parser
+#[derive(Debug, Parser)]
+pub struct SourceFolderNameArg {
+    /// The name of the source folder
+    #[arg(name = "from-folder-name", value_name = "FROM")]
+    pub name: String,
+}
+
+/// The target folder name argument parser
+#[derive(Debug, Parser)]
+pub struct TargetFolderNameArg {
+    /// The name of the target folder
+    #[arg(name = "to-folder-name", value_name = "TO")]
+    pub name: String,
+}