feat(command): implement command aliasing

Implement command aliasing in CmdRegistry and update command parsing to
resolve aliases.

- Added `aliases` field to `CmdRegistry` .
- Added `alias()` method to register short names.
- Added `resolve()` method to map aliases to canonical names.
- Updated `parse()` and `interactive()` to use `resolve()` .
- Added unit tests for alias resolution in `src/command/parse.rs` .

Co-Authored-By: fiddlerwoaroof/git-smart-commit (unsloth/gemma-4-26B-A4B-it-GGUF:UD-Q5_K_XL)

src/command/cmd.rs

@@ -113,15 +113,32 @@ struct CmdEntry {
 #[derive(Default)]
 pub struct CmdRegistry {
     entries: Vec<CmdEntry>,
+    aliases: Vec<(&'static str, &'static str)>,
 }
 
 impl CmdRegistry {
     pub fn new() -> Self {
         Self {
             entries: Vec::new(),
+            aliases: Vec::new(),
         }
     }
 
+    /// Register a short name that resolves to a canonical command name.
+    pub fn alias(&mut self, short: &'static str, canonical: &'static str) {
+        self.aliases.push((short, canonical));
+    }
+
+    /// Resolve a command name through the alias table.
+    fn resolve<'a>(&'a self, name: &'a str) -> &'a str {
+        for (alias, canonical) in &self.aliases {
+            if *alias == name {
+                return canonical;
+            }
+        }
+        name
+    }
+
     /// Register a command with both a text parser and an interactive constructor.
     /// The name is derived from a prototype command instance.
     pub fn register(&mut self, prototype: &dyn Cmd, parse: ParseFn, interactive: InteractiveFn) {
@@ -162,6 +179,7 @@ impl CmdRegistry {
 
     /// Construct a command from text arguments (script/headless).
     pub fn parse(&self, name: &str, args: &[String]) -> Result<Box<dyn Cmd>, String> {
+        let name = self.resolve(name);
         for e in &self.entries {
             if e.name == name {
                 return (e.parse)(args);
@@ -179,6 +197,7 @@ impl CmdRegistry {
         args: &[String],
         ctx: &CmdContext,
     ) -> Result<Box<dyn Cmd>, String> {
+        let name = self.resolve(name);
         for e in &self.entries {
             if e.name == name {
                 return (e.interactive)(args, ctx);
@@ -2781,6 +2800,12 @@ pub fn default_registry() -> CmdRegistry {
     // ── Wizard ───────────────────────────────────────────────────────────
     r.register_nullary(|| Box::new(HandleWizardKey));
 
+    // ── Aliases (short names for common commands) ────────────────────────
+    r.alias("add-cat", "add-category");
+    r.alias("formula", "add-formula");
+    r.alias("add-view", "create-view");
+    r.alias("q!", "force-quit");
+
     r
 }