Add pio badge

[heavyrubberslave]

Summary by CodeRabbit

• Documentation
  • Added PlatformIO registry badge link to the README.

[coderabbitai]

📝 Walkthrough

Walkthrough

The README.md file was updated with the addition of a PlatformIO registry badge link at the top, followed by an extra blank line. No functional changes were made to the documentation content or commands.

Changes

Cohort / File(s)	Summary
Documentation README.md	Added PlatformIO registry badge link at the top and inserted an additional blank line.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A badge shines bright upon the README,
A PlatformIO mark for all to see,
With spacing clean and links so true,
The docs now sparkle, fresh and new! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title 'Add pio badge' directly and clearly describes the main change: adding a PlatformIO registry badge to the README.md file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/add-pio-badge

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No actionable comments were generated in the recent review. 🎉

🧹 Recent nitpick comments

README.md (1)

3-4: Consider updating install instructions to use PlatformIO Registry.

Now that the library is available on PlatformIO Registry (as indicated by the badge), consider updating the install instructions at line 21 to reference the registry instead of the GitHub URL. This would provide a more streamlined installation experience.

For example:

lib_deps =
  slvctrlplus/slvctrl-protocol@^0.1.0

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