Adds new integration [adammcdonagh/home-assistant-powervault]

[adammcdonagh]

Checklist

• I've read the publishing documentation.
• I've added the HACS action to my repository.
• (For integrations only) I've added the hassfest action to my repository.
• The actions are passing without any disabled checks in my repository.
• I've added a link to the action run on my repository below in the links section.
• I've created a new release of the repository after the validation actions were run successfully.

Links

Link to current release: https://github.com/adammcdonagh/home-assistant-powervault/releases/tag/v1.2.3
Link to successful HACS action (without the ignore key): https://github.com/adammcdonagh/home-assistant-powervault/actions/runs/11354668236
Link to successful hassfest action (if integration): https://github.com/adammcdonagh/home-assistant-powervault/actions/runs/11354668233