Gate Apps usage instructions by model capability (#37145)

## What changed

- Add `include_apps_usage_instructions` to model metadata, defaulting to true for compatibility with existing metadata.
- Emit generic Apps guidance only when apps are available and the selected model enables it.
- Enable the capability for interactive model presets while leaving `codex-auto-review` and local models opted out.

## Testing

- Verify that missing metadata defaults to enabled and an explicit opt-out survives serialization.

GitOrigin-RevId: 6a20573cddfd3b80083d2b4b015829b49e6cc283

codex-rs/models-manager/src/model_info.rs

@@ -155,6 +155,7 @@ pub fn model_info_from_slug(slug: &str) -> ModelInfo {
         model_messages: Some(local_model_messages_for_slug(slug)),
         include_skills_usage_instructions: false,
         include_plugin_usage_instructions: false,
+        include_apps_usage_instructions: false,
         supports_reasoning_summary_parameter: true,
         default_reasoning_summary: ReasoningSummary::Auto,
         support_verbosity: false,