Merge pull request #21787 from nextcloud/enh/hello-psalm

.github/workflows/static-code-analysis.yml

.php_cs.dist

build/files-checker.php

build/psalm-baseline.xml

build/stubs/IntlChar.php

build/stubs/apcu.php

build/stubs/gd.php

build/stubs/imagick.php

build/stubs/intl.php

build/stubs/ldap.php

build/stubs/memcached.php

build/stubs/redis.php

build/stubs/redis_cluster.php

build/stubs/sftp.php

build/stubs/ssh2.php

build/stubs/xsl.php

composer.json

composer.lock

psalm.xml