wip: add filters

lib/prefixfilter/.clang-format

lib/prefixfilter/.gitignore

lib/prefixfilter/Bloom_Filter/Impala512.h

lib/prefixfilter/Bloom_Filter/bloom.hpp

lib/prefixfilter/Bloom_Filter/simd-block-fixed-fpp.h

lib/prefixfilter/Bloom_Filter/simd-block.h

lib/prefixfilter/CMakeLists.txt

lib/prefixfilter/CMakeLists.txt.old

lib/prefixfilter/LICENSE.md

lib/prefixfilter/NOTE.md

lib/prefixfilter/Prefix-Filter/Shift_op.cpp

lib/prefixfilter/Prefix-Filter/Shift_op.hpp

lib/prefixfilter/Prefix-Filter/min_pd256.cpp

lib/prefixfilter/Prefix-Filter/min_pd256.hpp

lib/prefixfilter/README.md

lib/prefixfilter/TC-Shortcut/TC-shortcut.hpp

lib/prefixfilter/TC-Shortcut/tc-sym.cpp

lib/prefixfilter/TC-Shortcut/tc-sym.hpp

lib/prefixfilter/Tests/PerfEvent.hpp

lib/prefixfilter/Tests/smart_tests.cpp