Add macro for character tables #1102

Job	Run time
build_wasm (nightly)	56s
build_lib_test (nightly)	54s
build_bin_spec (nightly)	1m 8s
build_wasm (beta)	53s
build_lib_test (beta)	1m 22s
build_wasm (stable)	52s
build_bin_spec (beta)	1m 34s
clippy_format	2m 32s
build_lib_test (stable)	1m 23s
build_wasm ($MSRV)	2m 52s
build_bin_spec (stable)	1m 6s
build_lib_test ($MSRV)	3m 33s
build_bin_spec ($MSRV)	3m 10s
lockfile	1m 3s
no_features_build_test (nightly)	36s
no_features_build_test (beta)	30s
no_features_build_test (stable)	31s
no_features_build_test ($MSRV)	2m 17s
	27m 12s

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