Enhancement: filter locations from config

[robchandhok]

As it stands right now (as of 2024.2.7), the config can contain a location but it isn't used anymore in the code (as far as I can tell).

For multiple locations, you likely only want one location in each instance of Home Assistant.

Enhancement would be that if you add a location in the config, it only loads/instantiates devices that match that location.

low priority compared to modernizing the config flow to be from the GUI. But a good enhancement I think.