feat!: remove decorateButtons

[fkakatie]

Description

Remove decorateButtons from aem-lib. Button decoration has been migrated to boilerplate for better architectural separation.

Fixes #43

Related Issue

Companion to adobe/aem-boilerplate#585

Breaking Changes

The decorateButtons function has been completely removed.

Projects that manually update aem.js will experience import/call errors. See MIGRATION.md for:

• What breaks
• Three migration options (new implementation, old implementation, or remove)
• Links to code examples

Motivation and Context

• Button decoration touches styles and should live in editable boilerplate
• Users are told not to modify aem.js but should feel empowered to customize buttons
• Architectural separation: styling logic belongs in boilerplate, not shared library

How Has This Been Tested?

• All existing tests pass
• The removed function's tests were also removed as part of this change

Types of changes

• 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 change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[trieloff]

The semantic commit messages look good and will create a breaking/major release for you.

[trieloff]

🎉 This PR is included in version 3.0.0 🎉

The release is available on:

• GitHub release
• v3.0.0

Your semantic-release bot 📦🚀