Adds new integration [alengwenus/ha-sma-ev-charger]

[alengwenus]

Checklist

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

Links

Link to current release: https://github.com/alengwenus/ha-sma-ev-charger/releases/tag/1.2.0 Link to successful HACS action (without the ignore key): https://github.com/alengwenus/ha-sma-ev-charger/actions/runs/9239508185 Link to successful hassfest action (if integration): https://github.com/alengwenus/ha-sma-ev-charger/actions/runs/9239671775