Add support for captured arguments from macros #978

Job	Run time
clippy	1m 22s
docs	1m 28s
runefmt	1m 44s
rustfmt	13s
basics	1s
msrv	1m 18s
miri_rune_alloc	4m 54s
miri_rune	6m 32s
build_feature (capture-io)	50s
build_feature (cli,doc)	1m 25s
no_default_features	44s
build_feature (cli,fmt)	1m 26s
no_std_minimal	2m 18s
wasm	51s
build_feature (cli)	1m 23s
build_feature (workspace)	49s
build_feature (languageserver)	1m 10s
build_feature (byte-code)	46s
test	2m 3s
	31m 17s

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