docs(pkg): canonical Nix-retirement inventory worklist (Wave 0)

Wave 0 of the Guix-primary consumer-repo campaign. Read-only GitHub
discovery over all 379 hyperpolymath repos (top-level HEAD):

  277 candidate (→ 14 waves, pending flake-vs-Guix∪container diff)
    8 monorepo → handle at source
    2 excluded (standards done, echidna pilot #73)
   92 out-of-scope (no top-level flake.nix, or flake but no Guix)

Provisional verdicts only — the final keep/remove decision is made
per-repo at wave time. .guix-channel-only and flake-without-Guix
traps checked and found empty (the earlier triage's 'my-lang =
channel-only' was inaccurate: my-lang has no flake.nix). The Wave
column is authoritative for slicing the wave sub-issues of #102.

Refs #103
Refs #101

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath