feat: Normalize remote plugin summary identities. (#22265)

Makes plugin summaries use config-style plugin@marketplace IDs while
exposing backend remote IDs separately as remotePluginId.

Also fix the consistency issue of REMOTE_SHARED_WITH_ME_MARKETPLACE_NAME

codex-rs/tui/src/chatwidget/tests/helpers.rs

@@ -1314,6 +1314,7 @@ pub(super) fn plugins_test_summary(
 ) -> PluginSummary {
     PluginSummary {
         id: id.to_string(),
+        remote_plugin_id: None,
         name: name.to_string(),
         share_context: None,
         source: PluginSource::Local {