Remove lib prefix

[Flamefire]

As @psychocoderHPC just mentioned it is better to drop the "lib" prefix from the name as otherwise a precompiled library would be called "liblibLiFFT" which is kinda redundant.
As the namespace is already only "lifft" one could keep the general name.

This would be the same as libSplash: https://github.com/ComputationalRadiationPhysics/libSplash The full name is libSplash but the namespace and folders are only "splash"

CCing @ax3l @bussmann

[ax3l]

Sure!

[ax3l]

yes the idea is to call the repo itself something like liFFT or lifft for easy directory naming and to use the official spelling libLiFFT to make obvious it is a library.

namespaces, CMake project name / targets, coding prefixes, etc. should simply be named without the lib as you suggested, lifft or liFFT as you prefer. Actual library archives (.so, .a, ...) are then automatically prefixed with lib and linking can be done via -Lpath -llifft which selects liblifft.[so|a] files.