Refactor packages: write docs #2721

Job	Run time
Formatting	17s
Build on ubuntu-latest (nightly)	3m 27s
Build on ubuntu-latest (stable)	3m 24s
Build on macos-latest (nightly)	4m 46s
Build on macos-latest (stable)	4m 16s
Build on windows-latest (nightly)	6m 41s
Build on windows-latest (stable)	6m 54s
Static Analysis (nightly)	2m 2s
Static Analysis (stable)	2m 13s
Units (nightly)	14m 31s
Units (stable)	13m 33s
E2E (nightly)	20m 30s
E2E (stable)	20m 23s
	1h 42m 57s

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