Adds new integration [Darkdragon14/ha-guest-mode]

[Darkdragon14]

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/Darkdragon14/ha-guest-mode/releases/tag/v1.0.0
Link to successful HACS action (without the ignore key): https://github.com/Darkdragon14/ha-guest-mode/actions/runs/11920529298/job/33222663540
Link to successful hassfest action (if integration): https://github.com/Darkdragon14/ha-guest-mode/actions/runs/11920529300/job/33222663578