Revert "Gradle: Add application plugin"

This reverts commit 16945d372f473954d6396ebf592e430466f28282.
Revert "Revert "Gradle: Add application plugin""

This reverts commit 59122dd1d0a2b349eb988f5a6d90f66077abe168.
Revert "Gradle: Add application plugin"

This reverts commit 4851a3c749f359283a9c086d4a000893a18386aa.