docs: add FOOTER.md and Documentation & Skills section to all READMEs #389

Job	Run time
test (totp)	1m 5s
test (achievements)	1m 2s
test (jwt-claims)	1m 1s
test (measurements)	1m 2s
test (encrypted-secrets-table)	56s
test (base32)	57s
test (defaults)	1m 6s
test (faker)	55s
test (inflection)	55s
test (stamps)	1m 2s
test (jobs)	58s
test (metaschema-schema)	1m 4s
test (verify)	55s
test (utils)	1m 3s
test (services)	1m 3s
test (geotypes)	54s
test (encrypted-secrets)	1m 3s
test (database-jobs)	54s
test (uuid)	1m 9s
test (types)	56s
test (metaschema-modules)	1m 36s
	21m 36s

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