fix: migrate to Policyfile #117

Job	Run time
lint-unit / runner / Cookstyle	11s
lint-unit / runner / Check Metadata	6s
lint-unit / runner / markdownlint	5s
lint-unit / runner / actionlint	8s
lint-unit / runner / yamllint	8s
lint-unit / runner / RSpec ubuntu-latest	38s
lint-unit / runner / linkspector	-9s
integration (windows-server-2019, default)	24s
integration (windows-server-2016, default)	21s
	1m 52s

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