feat: set message for multiple revsets

Allows to set the revision message of multiple revisions by passing
them as arguments. This only supports simple revisions, such as `@`,
`@-`, `xs`, and so on. Comple revisions such as `@..@-` are not
supported.

Fixes: #5

src/prompts/prompter.rs

@@ -107,7 +107,7 @@ impl Prompter for RealPrompts {
                 continue;
             }
 
-            // parse() only fails on empty — already handled above
+            // parse() only fails on empty - already handled above
             let Ok(desc) = Description::parse(trimmed) else {
                 println!("❌ Description cannot be empty. Please provide a description.");
                 continue;
@@ -269,7 +269,7 @@ mod tests {
     }
 
     /// A single CJK character (display width 2) is padded as if it occupies 2 columns,
-    /// not 1 — so the right-hand padding is 70 spaces, not 71
+    /// not 1 - so the right-hand padding is 70 spaces, not 71
     #[test]
     fn format_message_box_single_cjk_char() {
         let result = format_message_box("字");