misc: change library name to `coal` in doc

include/coal/collision_data.h

include/coal/collision_utility.h

include/coal/contact_patch_func_matrix.h

include/coal/doc.hh

include/coal/logging.h

include/coal/shape/geometric_shapes.h

python/version.cc

src/collision_utility.cpp

src/mesh_loader/assimp.cpp

src/mesh_loader/loader.cpp

src/narrowphase/gjk.cpp

test/benchmark.cpp

test/profiling.cpp

test/swept_sphere_radius.cpp