Remove "offline" from a base_component.yaml in dashboard

**Describe the problem you have/What new integration you would like**

When you have a base component (that other devices are based on) the component will be marked as OFFLINE since it does not point to a real device. Documentation says to add a . before the filename but that would hide it and you are not able to edit it from the dashboard. A better solution would be to mark it as a component in the dashboard.

**Please describe your use case for this integration and alternatives you've tried:**

At the moment the alternative is to leave the yaml as OFFLINE since there is no other option, or to hide it.

**Additional context**

Start by locating base_component.yaml and the dashboard entry point that marks components as OFFLINE. Check how base components are represented and edited in the dashboard. Done means a base component is identified as a component rather than OFFLINE and remains editable without hiding the YAML file.

Written by the indexing model from the issue text.