v1.9.0

• Supports WordPress v6.6, 6.7, 6.8
• update node to v22 LTS
• replace @flickerbox/build with direct webpack
• update scss to resolve deprecations
• replace scss variables with css custom properties
• update font-awesome version
• rebuild language file
• update mysql test version for select tests
• update ubuntu test version for select tests
• update shivammathur/setup-php dependency version
• update actions/checkout dependency version
• update shogo82148/actions-setup-mysql dependency version
• add wordpress.org live preview blueprint, screenshots
• update workflows to install svn for ubuntu 24