chore: overhaul profile README with improved structure and branding

[shenxianpeng]

Summary

This PR improves the organization profile README with better structure, branding consistency, and clearer project positioning.

Changes

• Added tagline — "Automated C/C++ linting and formatting for your CI/CD pipelines and local workflows."
• Added badges — docs, license, and GitHub stars
• Added 📖 About section — clear 2-sentence elevator pitch explaining who this is for and why it exists
• Restructured sections with consistent emoji usage (🚀, 🔧, 📦, 🤝)
• Used table layout for clang-tools packages — more scannable than bullet lists
• Improved 🤝 Contributing section — links to Code of Conduct, Discussion board
• Added community footer
• Fixed banner image path — changed from absolute /assets/... to relative ../assets/...

Before / After

See rendered preview

Checklist

• Branch follows conventional-branch spec (chore/improve-profile-readme)
• All existing repo links preserved
• Banner image path fixed

Summary by CodeRabbit

• Documentation
  • Updated README with refreshed branding and centered layout featuring updated badges
  • Added new About section describing the project's purpose
  • Updated contribution guidelines with Code of Conduct reference and community discussion links
  • Refreshed Getting Started and installation sections

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 7a39fb15-9222-4555-b41f-5ada21f4a700

📥 Commits

Reviewing files that changed from the base of the PR and between fa07a4e and 69ea418.

📒 Files selected for processing (1)

• profile/README.md

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Walkthrough

The GitHub profile README.md is rebranded with a centered banner header, updated status badges (Docs, License, GitHub stars), and reorganized content sections. The main body introduces "About" and "Get Started" sections alongside restructured "Clang Tools" and "Easy Installation" content. The contributing section is condensed into a structured list and concludes with a community footer.

Changes

Profile README Rebranding

Layer / File(s)	Summary
Header banner and badge shields profile/README.md	The README header is replaced with a centered banner image and new status badge block displaying documentation, license, and GitHub stars links.
Main content sections profile/README.md	The body content is restructured into "About", "Get Started", "Clang Tools — Simplified", and "Easy Installation" sections with refreshed headings and descriptive text.
Contributing section and community footer profile/README.md	The contributing section is condensed into a structured list including Code of Conduct and GitHub Discussions, with a centered "Made with ❤️" community footer appended.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related PRs

• cpp-linter/.github#57: Both PRs rewrite profile/README.md's introductory/branding content—specifically updating it to use new badge/banner and website-style formatting.
• cpp-linter/.github#35: Both PRs modify profile/README.md by restructuring and reworking its branding/sections (headers, "Get Started," installation, and contributing text) with documentation-only changes.
• cpp-linter/.github#56: Both PRs modify profile/README.md, specifically the "Clang Tools — Simplified"/installation documentation section with rebranding and link updates.

Suggested labels

documentation

Suggested reviewers

• 2bndy5

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and specifically describes the main change: an overhaul of the profile README with improved structure and branding, which is the core focus of this PR.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/improve-profile-readme

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