Deprecating Qt 4

[jsbackus]

I don't currently have any plans to actively remove Qt 4 support from the code, however, I will not be testing against it. Additionally, at some point I will be going over the CMake files and will likely remove the Qt 4 support from those. So, if there are any Qt 4 users out there, please make preparations.

[pktiuk]

AntiMicro is no longer maintained. There were no bigger fixes since 2017.
There is a new recommended version of this app called AntiMicroX.

As a part of cleanup, this issue will be closed and repository will be archived.
If you find this issue relevant also for that new version of application you can create a new issue (or discussion) there (but firstly check it, because many issues of the old app are fixed and there are some new functionalities implemented)
If you will decide to create a new issue for AntiMicroX remember to mention this issue for reference.