[FR]: Support for "object" attributes

[ildar170975]

An entity may have an "object" attribute usually accessed in jinjia templates as:

state_attr("sensor.some_entity","some_object_attr").subattr

It would be great to have a possibility to access them like:

attribute: some_object_attr:subattr

or

attribute: some_object_attr.subattr

[quammy]

+1

[loovanloon]

+1

I would like to have this feature as well.

As for the syntax: In automations I think the following syntax is used (but I am not sure):
trigger.zone.attributes.friendly_name

In my oppinion it would be preferable to keep the syntaxes alike.

Example: https://community.home-assistant.io/t/automation-for-entering-and-leaving-zones/265000/4?u=loovanloon