Update CS, add some github workflows

[jdevalk]

• Update WPCS and YoastCS
• Add some GitHub workflows
• Add ability to filter PDFs in the media library

[github-actions]

Test on Playground
Test this pull request on the Playground or download the zip.

[github-actions]

Composer package changes

Dev Packages	Operation	Base	Target
automattic/vipwpcs	New	-	3.0.1
dealerdirect/phpcodesniffer-composer-installer	Upgraded	v0.7.2	v1.0.0
php-parallel-lint/php-parallel-lint	Upgraded	v1.3.2	v1.4.0
phpcompatibility/phpcompatibility-paragonie	Upgraded	1.3.2	1.3.3
phpcompatibility/phpcompatibility-wp	Upgraded	2.1.4	2.1.6
phpcsstandards/phpcsextra	New	-	1.3.0
phpcsstandards/phpcsutils	New	-	1.0.12
phpstan/phpdoc-parser	New	-	2.1.0
sirbrillig/phpcs-variable-analysis	New	-	v2.12.0
slevomat/coding-standard	New	-	8.18.0
squizlabs/php_codesniffer	Upgraded	3.7.1	3.12.2
wp-coding-standards/wpcs	Upgraded	2.3.0	3.1.0
yoast/yoastcs	Upgraded	2.2.1	3.2.0
antecedent/patchwork	Removed	2.1.21	-
brain/monkey	Removed	2.6.1	-
doctrine/instantiator	Removed	1.4.1	-
hamcrest/hamcrest-php	Removed	v2.0.1	-
mockery/mockery	Removed	1.5.1	-
myclabs/deep-copy	Removed	1.11.0	-
nikic/php-parser	Removed	v4.15.2	-
phar-io/manifest	Removed	2.0.3	-
phar-io/version	Removed	3.2.1	-
phpunit/php-code-coverage	Removed	9.2.19	-
phpunit/php-file-iterator	Removed	3.0.6	-
phpunit/php-invoker	Removed	3.1.1	-
phpunit/php-text-template	Removed	2.0.4	-
phpunit/php-timer	Removed	5.0.3	-
phpunit/phpunit	Removed	9.5.27	-
sebastian/cli-parser	Removed	1.0.1	-
sebastian/code-unit	Removed	1.0.8	-
sebastian/code-unit-reverse-lookup	Removed	2.0.3	-
sebastian/comparator	Removed	4.0.8	-
sebastian/complexity	Removed	2.0.2	-
sebastian/diff	Removed	4.0.4	-
sebastian/environment	Removed	5.1.4	-
sebastian/exporter	Removed	4.0.5	-
sebastian/global-state	Removed	5.0.5	-
sebastian/lines-of-code	Removed	1.0.3	-
sebastian/object-enumerator	Removed	4.0.4	-
sebastian/object-reflector	Removed	2.0.4	-
sebastian/recursion-context	Removed	4.0.4	-
sebastian/resource-operations	Removed	3.0.3	-
sebastian/type	Removed	3.2.0	-
sebastian/version	Removed	3.0.2	-
theseer/tokenizer	Removed	1.2.1	-
yoast/phpunit-polyfills	Removed	1.0.4	-
yoast/wp-test-utils	Removed	1.1.1	-