Add additional helpers to bitfield data structure #2356

Job	Run time
check-cfg	22s
docs	28s
minimal	32s
msrv	50s
quickchecking	19s
rustfmt-clippy	28s
test (ubuntu-latest, 9.0, 1, 0, 0, 0, 0)	1m 51s
test-book	9s
test-expectations (ubuntu-latest)	44s
test-expectations (macos-12)	55s
test (ubuntu-latest, 9.0, 1, 0, 0, 1, 0)	1m 47s
test (ubuntu-latest, 9.0, 1, 0, 1, 0, 0)	1m 56s
test (ubuntu-latest, 9.0, 1, 0, 1, 1, 0)	1m 48s
test (ubuntu-latest, 9.0, 1, 1, 0, 0, 0)	2m 11s
test (ubuntu-latest, 9.0, 1, 1, 0, 1, 0)	2m 52s
test (ubuntu-latest, 9.0, 1, 1, 1, 0, 0)	3m 33s
test (ubuntu-latest, 9.0, 1, 1, 1, 1, 0)	2m 29s
test (ubuntu-latest, 16.0, 1, 0, 0, 0, 0)	2m 30s
test (ubuntu-latest, 16.0, 1, 0, 0, 1, 0)	2m 34s
test (ubuntu-latest, 16.0, 1, 0, 1, 0, 0)	2m 56s
test (ubuntu-latest, 16.0, 1, 0, 1, 1, 0)	2m 43s
test (ubuntu-latest, 16.0, 1, 1, 0, 0, 0)	3m 8s
test (ubuntu-latest, 16.0, 1, 1, 0, 1, 0)	3m 24s
test (ubuntu-latest, 16.0, 1, 1, 1, 0, 0)	3m 9s
test (ubuntu-latest, 16.0, 1, 1, 1, 1, 0)	3m 1s
test (ubuntu-latest, 16.0, 0, 0, 1)	1m 46s
test (macos-12, 9.0, 0, 0, 0)	2m 49s
success	1s
	51m 15s

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