Support remote marketplaces in the plugin CLI (#42150)

## What changed

- Include remote catalog entries in `codex plugin list`, including their source,
  version, install policy, and authentication policy in JSON output.
- Support adding and removing remote plugins through the existing plugin CLI.
- Cache remote catalogs by scope and collection. Prefer fresh cached results, and
  refetch once when an add request misses a plugin in the cache.
- Preserve the local curated catalog when an unfiltered remote listing fails,
  while surfacing errors for explicitly selected remote marketplaces.

## Testing

- Cover remote listing, installation, removal, catalog fallback, cache refresh,
  collection isolation, and install failure behavior.

GitOrigin-RevId: 09796b2c393d102e00ba9289f784d78a2e166a54

codex-rs/app-server/src/request_processors/plugins.rs

@@ -680,8 +680,11 @@ impl PluginRequestProcessor {
             match codex_core_plugins::remote::fetch_openai_curated_remote_collection_marketplace(
                 &remote_plugin_service_config,
                 auth.as_ref(),
+                /*catalog_cache_root*/ None,
+                RemotePluginCatalogCacheMode::ForceRefetch,
             )
             .await
+            .map(|outcome| outcome.marketplace)
             {
                 Ok(Some(remote_marketplace)) => {
                     data.push(remote_marketplace_to_info(remote_marketplace));