v0.3.0-alpha

Changelog

• 9c345be: Implement feedback (@SimonKienzler)
• c09c70d: Merge pull request #14 from SimonKienzler/switch-to-stackit-sdk (@PatrickKoss)
• 980a264: Switch from stackit-dns-api-client-go to stackit-sdk-go (@SimonKienzler)
• 4300330: Update README (@SimonKienzler)
• 68e6032: Update README.md (@PatrickKoss)