docs: Add comprehensive CHANGELOG.md (#1)

- Created CHANGELOG.md following Keep a Changelog format
- Documented major changes from 2024-02-10 to 2025-06-28
- Included contributor attributions and PR references
- Added maintainer guidelines for future updates

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CHANGELOG.md

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+# Changelog
+
+All notable changes to the Personal Security Checklist project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+---
+
+## [Unreleased]
+
+### Changed
+- Updated authentication software links for better accuracy ([#280](https://github.com/Lissy93/personal-security-checklist/pull/280))
+- Fixed multiple typos and grammar issues across the checklist ([#280](https://github.com/Lissy93/personal-security-checklist/pull/280))
+
+---
+
+## [2025-06-28] - Latest Release
+
+### Changed
+- Updated authentication software links in checklist
+- Fixed typos and grammar throughout the documentation
+- Auto-generated checklist update
+
+### Contributors
+- [@raycadle](https://github.com/raycadle)
+
+---
+
+## [2025-04-19]
+
+### Changed
+- Migrated from GitHub Actions to readme-contribs for contributor management
+- Streamlined contributor attribution workflow
+
+---
+
+## [2025-03-29]
+
+### Fixed
+- Fixed broken links in the security checklist ([#277](https://github.com/Lissy93/personal-security-checklist/pull/277))
+
+### Contributors
+- [@byfnoel](https://github.com/byfnoel)
+
+---
+
+## [2024-08-17]
+
+### Changed
+- Removed duplicate sections and cleaned up formatting
+- Improved checklist structure and organization
+
+### Contributors
+- [@ajdumanhug](https://github.com/ajdumanhug)
+- [@dextermallo](https://github.com/dextermallo)
+
+---
+
+## [2024-08-03]
+
+### Fixed
+- Removed duplicate sections and extra whitespace
+- Improved checklist formatting
+
+---
+
+## [2024-06-14]
+
+### Fixed
+- Fixed typo in README build instructions ([#257](https://github.com/Lissy93/personal-security-checklist/pull/257))
+- Updated grammar in README documentation ([#254](https://github.com/Lissy93/personal-security-checklist/pull/254))
+
+### Contributors
+- [@jxdv](https://github.com/jxdv)
+- [@WairimuMaringa](https://github.com/WairimuMaringa)
+
+---
+
+## [2024-05-18]
+
+### Added
+- Added edit link functionality to improve contribution workflow
+
+---
+
+## [2024-03-18]
+
+### Changed
+- Updated link for "How Secure Is My Password?" tool
+
+---
+
+## [2024-03-10] - Priority Level Update
+
+### Changed
+- **BREAKING**: Renamed "recommended" priority level to "essential" across the entire project
+- Updated data structure to reflect new priority terminology
+- Updated navigation to use live data instead of mock data
+
+### Removed
+- Removed mock data files
+
+---
+
+## [2024-02-27]
+
+### Added
+- Added underline to hyperlinks for better accessibility ([#233](https://github.com/Lissy93/personal-security-checklist/issues/233))
+- Added missing links to GitHub and Contributing pages in navbar
+
+---
+
+## [2024-02-25]
+
+### Changed
+- Updated personal security checklist with community contributions ([#241](https://github.com/Lissy93/personal-security-checklist/pull/241))
+
+### Contributors
+- [@wallies](https://github.com/wallies)
+
+---
+
+## [2024-02-12]
+
+### Added
+- Added settings menu to the web interface
+- Added informational message before stats are recorded
+
+---
+
+## [2024-02-11]
+
+### Added
+- Added workflow to maintain GitHub Pages deployment
+- Updated Vercel configuration for better deployment
+
+### Changed
+- Updated meta tags and site configuration for improved SEO
+
+---
+
+## [2024-02-10]
+
+### Added
+- Updated pull request template with better guidelines
+- Enhanced contributing documentation
+
+---
+
+## About This Project
+
+**Personal Security Checklist** is a curated list of tips and best practices for securing your digital life. 
+
+- 🌐 **Website**: [digital-defense.io](https://digital-defense.io/)
+- 📝 **Checklist**: [CHECKLIST.md](./CHECKLIST.md)
+- 🔧 **Source Data**: [personal-security-checklist.yml](./personal-security-checklist.yml)
+- 🤝 **Contributing**: See [CONTRIBUTING.md](./.github/CONTRIBUTING.md)
+
+---
+
+## Contributing
+
+Contributions are welcome! Please see our [Contributing Guidelines](./.github/CONTRIBUTING.md) for more information.
+
+When submitting changes to the checklist, please provide references backing up any information you're adding, amending, or removing.
+
+---
+
+## License
+
+Licensed under [MIT](./LICENSE) © [Alicia Sykes](https://aliciasykes.com) 2024
+
+---
+
+<!-- 
+For maintainers: When updating this changelog, please follow these guidelines:
+- Group changes by: Added, Changed, Deprecated, Removed, Fixed, Security
+- Link to relevant PRs and issues
+- Credit contributors
+- Use ISO date format (YYYY-MM-DD)
+- Keep entries concise but descriptive
+-->