API Migrate code and docs from other modules #535

Job	Run time
CI / Generate matrix	18s
CI / Context	1s
CI / 8.1 prf-low mysql57 phpunit all	2m 59s
CI / Check governance	0s
CI / 8.2 mariadb phpunit all	3m 12s
CI / 8.3 mysql80 phpunit all	3m 54s
CI / 8.1 mysql57 phplinting	2m 5s
CI / 8.1 mysql57 endtoend asset-admin	28m 51s
CI / 8.1 mysql57 endtoend versioned-admin	9m 41s
CI / 8.1 mysql57 endtoend silverstripe-elemental	44m 35s
CI / Dispatch tag patch release	0s
	1h 35m 36s

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