Fix zeroconf discovery handling and container list spacing

[404GamerNotFound]

Motivation

• Prevent an AttributeError during reconfiguration when zeroconf discovery_info is not a dict-like object but an attribute-based object.
• Ensure the sensor.VServer_containers value is formatted with spaces after commas for better readability.
• Accept multiple zeroconf payload shapes (mapping vs attribute object) and prefer any available ip_address when host is missing.

Description

• Update async_step_zeroconf in config_flow.py to accept Mapping-style discovery_info, check ip_address as a fallback, and handle attribute-style objects via getattr to avoid using .get on non-mapping objects.
• Normalize the raw containers string in ssh_collector.py by splitting on commas, trimming parts, and joining with ", " before returning it in the result dict.
• Add the Mapping import and adjust imports ordering in config_flow.py to support the new check.

Testing

• No automated tests were executed for these changes.

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Codex Task