Add `vault_pki` modules #180

Job	Run time
CI / Get Changed Files / Get Changed Files	8s
CI / Changed Files Debug Output	1s
CI / Pre-Commit / Pre-Commit	2m 11s
CI / Python Package	0s
CI / Docs / Docs	1m 23s
CI / Test / macOS (3.9, 3006.8)	1m 8s
CI / Test / Linux (3.9, 3006.8)	21m 42s
CI / Test / macOS (3.10, 3007.1)	1m 9s
CI / Test / Linux (3.9, 3007.1)	21m 59s
CI / Test / Windows (3.8, 3006.8)	3m 12s
CI / Test / Linux (3.10, 3006.8)	20m 5s
CI / Test / Windows (3.8, 3007.1)	2m 59s
CI / Test / Linux (3.10, 3007.1)	21m 26s
CI / Test / Linux (3.8, 3006.8)	23m 46s
CI / Deploy Python Package (Test PyPI)	0s
CI / Deploy Python Package (PyPI)	0s
CI / Set the CI Pipeline Exit Status	16s
	2h 1m 25s

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