Reconcile with policymaker; surface the four canonical term sets

[yesnet0]

Summary

• Restructures dioterms around the four canonical term families mirrored 1:1 with policymaker.disclose.io's gh-pages templates: terms/vdp/, terms/vdp-with-cvd/, terms/safe-harbor/, terms/simple-safe-harbor/ — each in en-US, ar, np-NP.
• Adds two previously-missing templates: the plain VDP (without CVD) and the standalone full Safe Harbor (previously only embedded inside the VDP).
• Relocates BBP to bbp/en-US.md as a fifth canonical (not part of the policymaker-aligned four; preserved for community use).
• Moves the modular core-terms/ fragments folder to archive/core-terms/ to preserve history while surfacing the four canonicals at the top level.
• Deletes /practices/ — the stubs never populated; operational-playbook content belongs on the disclose.io website.
• All file moves use git mv to preserve blame.
• Every canonical file byte-matches the corresponding policymaker template.

Layout after merge

terms/
  README.md              # explains the four-canonical layout
  languages.json         # supported-locale manifest (from policymaker)
  vdp/{en-US,ar,np-NP}.md
  vdp-with-cvd/{en-US,ar,np-NP}.md
  safe-harbor/{en-US,ar,np-NP}.md
  simple-safe-harbor/{en-US,ar,np-NP}.md
bbp/en-US.md             # 5th canonical (policymaker doesn't carry BBP)
regional/                # unchanged — jurisdictional variants
maturity/                # unchanged — diostatus levels 0-5
archive/core-terms/      # moved here from repo root

Coordination

Paired with disclose/website PR that bumps the submodule pointer and updates scripts/preprocess-framework.js. Merge this first.

Policymaker is treated as authoritative for term prose drift; dioterms is re-aligned where the two diverged. Future edits to the four canonicals should happen here first, with policymaker picking them up on its next release.

Test plan

• Verify terms/languages.json content matches policymaker
• Verify each of the 12 canonical files (4 × 3 locales) byte-matches disclose/policymaker@gh-pages:templates/disclose-io-<template>/<locale>.md
• Confirm git blame preserved across the three renames (core-terms-vdp.md → terms/vdp-with-cvd/en-US.md, core-terms-bbp.md → bbp/en-US.md, simple-safeharbor/simple-safe-harbor.md → terms/simple-safe-harbor/en-US.md)
• Confirm archive/core-terms/ carries blame from the original core-terms/ folder

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