feat(t3code): add new fable 5 favorite

Author: khaneliman

modules/home/programs/terminal/tools/t3code/default.nix

@@ -300,6 +300,10 @@ in
             diffIgnoreWhitespace = true;
             diffWordWrap = false;
             favorites = [
+              {
+                provider = "claudeAgent";
+                model = "claude-fable-5";
+              }
               {
                 provider = "claudeAgent";
                 model = "claude-opus-4-8";