nu-cli ctrl-c feature support. (#3718)

Seems we do `ctrl` feature checks in `nu-cli` and `nu-command`. We should find a better way to report the enabled features un the `version` command without using the conditionals (or somewhere else)

crates/nu-command/src/commands/core_commands/version.rs

@@ -184,6 +184,8 @@ pub fn version(args: CommandArgs) -> Result<OutputStream, ShellError> {
 fn features_enabled() -> Vec<String> {
     let mut names = vec!["default".to_string()];
 
+    // NOTE: There should be another way to know
+    // features on.
     #[cfg(feature = "ctrlc")]
     {
         names.push("ctrlc".to_string());