All PHP namespaces and related references have been updated from Da\User to pcrt\User throughout the codebase, including composer.json autoload settings and all source files. This change standardizes the project under the new pcrt\User namespace for improved clarity and maintainability.
* replace swiftmailer references with generic interface references
* replace swiftmailer dependency with suggested symfonymailer (option to also use old swiftmailer)
* remove getSwiftMailer fro mtests
* adjuts config to skip yii2 coded swiftmailer
* dev and test only until php 7.4 (synphonymailer)
