chore: extract aggregate-library into its own repository #110

Job	Run time
governance / Guix primary / Nix fallback policy	8s
governance / Code quality + docs	22s
governance / Trusted-base reduction policy	12s
governance / Validate Hypatia baseline	7s
governance / Well-Known (RFC 9116 + RSR)	8s
governance / Licence consistency	8s
governance / Security policy checks	7s
governance / Workflow security linter	6s
governance / Language / package anti-pattern policy	16s
	1m 34s

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