* fix: stop corrupt sidebar data from causing errors
By filtering out sidebars without a name in get_sidebars.
The name is a required field when entering new sidebars,
so sidebars missing a name are likely corrupt.
Designed to address "Cannot access offset of type string on string"
when trying to access $sidebar['name'] for sidebars without a name.
See https://wordpress.org/support/topic/php-8-2-error-6/.
* chore: formatting