revert(readme): restore canonical README.adoc (#143) #172

Job	Run time
governance / Security policy checks	7s
governance / Guix primary / Nix fallback policy	8s
governance / Well-Known (RFC 9116 + RSR)	10s
governance / Trusted-base reduction policy	12s
governance / Licence consistency	12s
governance / Code quality + docs	19s
governance / Workflow security linter	5s
governance / Check Workflow Staleness	9s
governance / Language / package anti-pattern policy	38s
governance / Validate Hypatia Baseline	0s
	2m 0s

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