[version] Add ESPHome and Apollo firmware version sensors

[bharvey88]

Summary

• Adds ESPHome version sensor (platform: version) as a diagnostic entity
• Adds Apollo firmware version sensor (platform: template, exposes ${version} substitution) as a diagnostic entity

Test plan

• Confirm "ESPHome Version" entity appears in Home Assistant after flashing
• Confirm "Apollo Firmware Version" entity shows the correct version string

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes

[coderabbitai]

Warning

Rate limit exceeded

@bharvey88 has exceeded the limit for the number of commits that can be reviewed per hour. Please wait 9 minutes and 7 seconds before requesting another review.

⌛ How to resolve this issue?

After the wait time has elapsed, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

We recommend that you space out your commits to avoid hitting the rate limit.

🚦 How do rate limits work?

CodeRabbit enforces hourly rate limits for each developer per organization.

Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout.

Please see our FAQ for further information.

📥 Commits

Reviewing files that changed from the base of the PR and between 0e79266 and d547a43.

📒 Files selected for processing (1)

• Integrations/ESPHome/Core.yaml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch version-sensors

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}