Adds new integration [meichthys/uptime_kuma]

[meichthys]

🙇‍♂️ Sorry I was in a rush and didn't realize we weren't supposed to request reviews.

Here's the new pull request.

Link to successful HACS action: https://github.com/meichthys/uptime_kuma/actions/runs/3237487460 Link to successful hassfest action (if integration): https://github.com/meichthys/uptime_kuma/actions/runs/3237487459

[hacs-bot[bot]]

Running checks on meichthys/uptime_kuma

[hacs-bot[bot]]

Your repository is now added to HACS :tada: Here is a few resources that can be useful:

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