Stacked on #26039 , #26113

Objective

• Currently the Inspector lists entities from only one subapp in a remote app. Normally there is the main subapp and the render subapp, each with a world and BRP endpoint.
• Get details from both the main app and the render app of the remote target

Solution

• add a s to RemoteEntityFetch

Testing

• cargo run --example server --features="bevy_remote,dev"
• cargo run --example remote_inspector --features="bevy_inspector,bevy_remote_client,dev"

Showcase