v0.21.0-beta1

This is a prerelease to test compatibility with HA2025.3

What's Changed

🛠️ Dependencies

• Bump MQTT libraries for compatibility with HA2025.3 by @WebSpider in #368
• Bump ruff from 0.9.7 to 0.9.9 by @dependabot in #371
• Bump pytest from 8.3.4 to 8.3.5 by @dependabot in #373
• Bump pyright from 1.1.394 to 1.1.396 by @dependabot in #374
• Bump mkdocstrings from 0.28.1 to 0.28.2 by @dependabot in #375

Full Changelog: v0.20.1...v0.21.0-beta1