rename fmt PACKED #1576

Job	Run time
build (g++-8, Debug, 17, ubuntu-20.04, ON)	6m 44s
build (g++-8, Release, 17, ubuntu-20.04, ON)	8m 32s
build (g++-10, Debug, 17, ubuntu-20.04, ON)	6m 16s
build (g++-10, Release, 17, ubuntu-20.04, ON)	9m 3s
build (g++-13, Release, 23, ubuntu-20.04, ON, sudo apt -o Acquire::Retries=5 install g++-13)	13m 54s
build (g++-13, Debug, 23, ubuntu-20.04, ON, sudo apt -o Acquire::Retries=5 install g++-13)	10m 9s
build (g++-10, Release, 17, ubuntu-20.04, OFF, -DQUILL_NO_EXCEPTIONS=ON -DQUILL_BUILD_TESTS=ON)	1m 35s
build (g++-10, Release, 20, ubuntu-20.04, ON, -DQUILL_USE_VALGRIND=ON, -T memcheck, sudo apt -o A...	18m 41s
build (clang++-12, Release, 20, ubuntu-20.04, ON, -DQUILL_SANITIZE_ADDRESS=ON)	21m 11s
build (clang++-12, Release, 20, ubuntu-20.04, ON, -DQUILL_SANITIZE_THREAD=ON)	16m 4s
	1h 52m 9s

Provide feedback