New wrapper `FeatureShare` #6901

Job	Run time
check-code / mypy	1m 57s
check-schema / schema	14s
check-md-links / markdown-link-check	3m 23s
check-package / init-store	4s
check-package / pkg-build (ubuntu-latest)	28s
check-package / pkg-check (ubuntu-20.04, 3.8)	58s
check-package / pkg-check (ubuntu-20.04, 3.10)	59s
check-package / pkg-check (macos-11, 3.8)	2m 43s
check-package / pkg-check (macos-11, 3.10)	2m 11s
check-package / pkg-check (windows-2022, 3.8)	2m 39s
check-package / pkg-check (windows-2022, 3.10)	2m 39s
check-package / pkg-guardian	1s
	18m 16s

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