[FEAT] Node client-side PHAL Plugins

[NeonDaniel]

Objective

Define a module for loading PHAL plugins for node-specific hardware support. Messaging from core modules will also need to be forwarded to the local plugins for proper handling.

Initial Implementation Requirements

• Define a method for loading configured plugins
• Ensure local plugins function as expected (i.e. LED and System plugins could be used to start)
• Define message forwarding from core to clients (likely requires a WS connection and not just HTTP)

Other Considerations

• To keep things light, it may be worth writing very specific plugins for nodes rather than loading multiple generic plugins
• The FakeBus instance used by the voice_loop should be shared with the PHAL service
• This can probably implement neon-enclosure directly
• Full support will require a Websocket connection to HANA and more events supported in the MQ/Messagebus connector