fix paroquant was not included (#2900)

Author: CSY-ModelCloud

MANIFEST.in

@@ -4,6 +4,7 @@ recursive-include gptqmodel_ext/exllamav2 *.h *.cuh *.cu *.cpp
 recursive-include gptqmodel_ext/marlin *.h *.cuh *.cu *.cpp *.hpp
 recursive-include gptqmodel_ext/machete *.h *.hpp *.cuh *.cu *.cpp *.py
 recursive-include gptqmodel_ext/cutlass_extensions *.h *.hpp *.cuh *.cu *.cpp *.py
+recursive-include gptqmodel_ext/paroquant *.h *.cuh *.cu *.cpp
 recursive-include gptqmodel_ext/qqq *.h *.cuh *.cu *.cpp
 recursive-include gptqmodel/exllamav3/util/hadamard_data *.txt
 include licenses/*