feat: support comments in ordinary source buffers

tests/unit/ruby.rs

@@ -626,6 +626,33 @@ fn config_leader_defaults_custom_keys_validation_and_required_wire_field() {
     }
 }
 
+#[test]
+fn source_review_actions_and_diff_command_aliases_share_the_core_catalog() {
+    let fixture = Fixture::new();
+    let path = fixture.file(
+        "config.rb",
+        r#"
+Vamp.configure do |config|
+  config.bind "C", config.core.comment
+  config.bind "N", config.core.review.next
+  config.bind "S", config.core.review.save
+  raise "missing diff comment alias" unless Vamp.builtin_command?("diff.comment")
+  raise "missing diff review alias" unless Vamp.builtin_command?("diff.review.edit")
+  raise "mutable review action" unless config.core.review.frozen? && config.core.comment.frozen?
+end
+"#,
+    );
+    let loaded = load_config(&path).unwrap();
+    let actions: Vec<_> = loaded
+        .bindings
+        .iter()
+        .filter_map(|binding| binding.command.as_deref())
+        .collect();
+    assert!(actions.contains(&"core.comment"));
+    assert!(actions.contains(&"core.review.next"));
+    assert!(actions.contains(&"core.review.save"));
+}
+
 #[test]
 fn git_gutter_config_modes_default_and_rejection() {
     use crate::gutter::GutterStyle;