v2.0.0

Added

• phpcbf auto-fix for ConsistentAssignmentAlignment
  and ConsistentDoubleArrowAlignment sniffs.
• OverAligned error code for both alignment sniffs:
  flags groups where operators are padded beyond the
  longest left-hand side.
• Codecov integration: test coverage reporting on
  PHP 8.4 with PCOV, uploaded on every PR and push.
• PHPStan level 6 with strict-rules for sniff source
  code, integrated into CI pipeline.
• GitHub Actions: prerelease workflow for release/*
  branches via workflow_dispatch.
• Release and PR validation workflows now derive version
  from CHANGELOG headings instead of composer.json.

Changed

• Published package on Packagist.
  VCS repository setup is no longer needed.
• Removed version field from composer.json. Packagist
  derives versions from git tags exclusively.