feat(references): add ticket reference footers

Refs: #4

src/prompts/prompter.rs

@@ -9,7 +9,7 @@ use inquire::{Confirm, Text};
 use unicode_width::UnicodeWidthStr;
 
 use crate::{
-    commit::types::{Body, BreakingChange, CommitType, Description, Scope},
+    commit::types::{Body, BreakingChange, CommitType, Description, References, Scope},
     error::Error,
 };
 
@@ -33,6 +33,9 @@ pub trait Prompter {
     /// Prompt the user to optionally add a free-form body via an external editor
     fn input_body(&self) -> Result<Body, Error>;
 
+    /// Prompt the user to optionally add comma-separated ticket references
+    fn input_references(&self) -> Result<References, Error>;
+
     /// Prompt the user to confirm applying the commit message
     fn confirm_apply(&self, message: &str) -> Result<bool, Error>;
 
@@ -91,6 +94,19 @@ impl Prompter for RealPrompts {
         }
     }
 
+    fn input_references(&self) -> Result<References, Error> {
+        let answer = inquire::Text::new("Enter comma-separated references (optional):")
+            .with_help_message("References are optional. If provided, will become footer(s) in the commit message. References must be comma-separated.")
+            .with_placeholder("Leave empty if no references")
+            .prompt_skippable()
+            .map_err(|_| Error::Cancelled)?;
+        match answer {
+            None => Ok(References::default()),
+            Some(s) if s.trim().is_empty() => Ok(References::default()),
+            Some(s) => Ok(References::from(s)),
+        }
+    }
+
     fn input_description(&self) -> Result<Description, Error> {
         loop {
             let answer = Text::new("Enter description (required):")