Support for custom file types when testing file uploads

Fixed wrong usage of trait

Implemented support for file uploads to be tested

fixed some internal issues in test case descriptors

new test case classes for open api v3 specification

minor improvements based on shop team feedback

fixed a package-comparator bug, migrated package-comprator into a rust application and added the gxdev CLI applicationm as binary

event dispatcher implementation and shop installer fix + debug mode

Shop installation routine for versions >= v4.1.1.0 and a lot of project cleanup

project structure cleanup, some refinements and refactorings, replaced pdo/hydrahon with doctrine in api testing framework

Improved database fixture import mechanism and use injeted doctrine connection instance to share it with the shop system

Db Fixture Facade, API Testing improvements and minor bugfixes

Minor bugfixes and response plus status code verification for post/put request testing

New TestCase classes for POST/PUT/DELETE API requests

A handful commands to automate shop tasks (not really refined)