Minor Release v1.4

These are mostly cosmetic changes:

• Put kernels in separate module
• Put profiling and LIKWID instrumentation in separate module
• Add clang-format specification and reformat
• Add banner
• Replace huge copyright header with something smaller
• Make NHR@FAU copyright holder
• Add new build targets for format and .clangd and remove tags target
• Clean up of Makefile and sources

New features:

• The Makefile will automatically generate a clang LSP configuration
• The CLANG toolchain is the default now. Please change to other toolchains in config.mk
• VERBOSE_AFFINITY will now output the complete affinity mask and the processor a thread is currently scheduled on
• make distclean will now clean all toolchains, enabled by another directory level ./build for the build products
• Correct rebuild of all objects if any build configuration has changed (include_<TOOLCHAIN>.mk and config.mk)