feat(standards): add ARG + FRG language-maturation framework

[hyperpolymath]

Summary

Lands the ARG/FRG (Adoption-Readiness Grades + Foundations-Readiness Grades) language-maturation framework as a new top-level spec pair under standards/. Companion to the existing CRG/TRG framework family.

This is a rebased version of the original arg-frg-framework-landing branch from a parallel session, brought current with main (which now carries the V-lang→Zig migration completion in LANGUAGE-POLICY.adoc and CARTRIDGE-FORMAT.adoc — those edits are preserved by this rebase, not reverted).

What lands (11 new files, +3315 lines)

adoption-readiness-grades/
├── ADOPTION-READINESS-GRADES.a2ml           # machine-readable spec
├── ADOPTION-READINESS-GRADES.adoc           # human spec
├── README.adoc                              # entry doc
├── SELF-ASSESSMENT.adoc                     # how to assess your own language
├── AUDIT-FINDINGS-2026-05-28.adoc           # Phase 6 audit (X-A grades for 17 languages)
└── templates/
    └── ARG-PROFILE-TEMPLATE.adoc            # per-language template

foundations-readiness-grades/
├── FOUNDATIONS-READINESS-GRADES.a2ml
├── FOUNDATIONS-READINESS-GRADES.adoc
├── README.adoc
├── SELF-ASSESSMENT.adoc
└── templates/
    └── FRG-PROFILE-TEMPLATE.adoc

Cross-axis invariants (codified in the framework)

• ARG ≤ TRG always — a language can't be more adoptable than its toolchain is ready
• ARG-A requires FRG ≥ B — top-tier adoption needs foundational rigour

Relationship to the dashboard

nextgen-languages PR #58 (already merged) added the Language Grades Matrix and a regex-based grade extractor in language-status-tracker.jl that reads per-language spec/{ARG,FRG,TRG}-PROFILE.adoc files following the templates landed here.

Test plan

• adoption-readiness-grades/README.adoc renders
• foundations-readiness-grades/README.adoc renders
• Templates copy-pasteable into a language repo's spec/ dir
• No regression on the V-lang→Zig migration text in LANGUAGE-POLICY.adoc (rebase preserved standards#227)

🤖 Generated with Claude Code

[github-actions]

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