Plugin Service Registration Considerations for App Render Modes

[ElliottBrand]

Plugin developers may need to define how their plugin should be registered in the different render modes. For example, if the plugin is intended to be used in the client UI for each site user, it may need to be a Scoped if the current render mode is Server or Singleton if the current render mode is WebAssembly (since Auto mode would switch on the fly). In other situations, the plugin may need to be Scoped, Singleton, or Transient always (maybe it's a plugin that offers server-side functionality for the admin area).