feat: initialize v2 grammar development track #258

Job	Run time
governance / Workflow security linter	0s
governance / Well-Known (RFC 9116 + RSR)	0s
governance / Language / package anti-pattern policy	0s
governance / Code quality + docs	0s
governance / Guix primary / Nix fallback policy	0s
governance / Security policy checks	0s
	0s

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