Adds new integration [Pacco24626/nexus_astro]

[Pacco24626]

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/Pacco24626/nexus_astro/releases/tag/v1.0.1
Link to successful HACS action (without the ignore key): https://github.com/Pacco24626/nexus_astro/actions/runs/34103935395/job/101684506109
Link to successful hassfest action (if integration): https://github.com/Pacco24626/nexus_astro/actions/runs/34103935395/job/101684506299

🤖 Generated with Claude Code

[hacs-bot]

Thank you for submitting your repository to HACS (Home Assistant Community Store).

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Your repository is waiting to be reviewed and included in HACS.

You can view the current queue here. Pull requests are processed in the order they were created, oldest first.

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• Comment on the pull request - The reviewer will contact you when they have feedback or questions.
• Open a new pull request - This won't speed up the process and creates duplicate work.
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• Merge in the default branch - Only do this if a maintainer asks you to resolve a merge conflict.

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• Approve and merge your pull request if everything meets the requirements
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