[BUG] Cannot add the child plugin standalone in `provideStates`

[Andreas-Hjortland]

Describe the bug Because we are adding the plugin using the NGXS_PLUGINS injection token instead of the withNgxsPlugin, we cannot load the plugin on a lazy loaded route, but have to do it in the entry point (where we call provideStore.

To Reproduce

• Create a new angular app using standalone components and add ngxs
• Add a state in a lazy loaded route with provideStores and add the plugin with withNgxsMessagePlugin
• Notice that the child handler get the events and creates actions, but they are never applied to the state

Expected behavior Expected the state to change when the child handler receives the events from the parent handler.

Desktop (please complete the following information):

• OS: Any (tested on linux and windows 11)
• Browser: Any (tested in chrome and firefox)

[Andreas-Hjortland]

I cannot fix this until we have updated minimum required version to angular 18, until then the workaround will be to use module based providers or add the plugin in the root of the app, and let any child pages be bootstrapped individually instead of as angular routes.

[Andreas-Hjortland]

Also depends on this fix https://github.com/ngxs/store/issues/2227