docs(voice): complete the SKILL.md / voice-profile.org structural split

Backfills the remaining 40 patterns into the paired source-of-truth
shape Pattern 13 demonstrated in 296b2e6. Each pattern in SKILL.md
now collapses to a mode-tagged header plus a one-line Rule plus a
profile pointer. The full Problem, Basis, Before/After, Detection,
and History land in the corresponding voice-profile.org §N section.

Sizes:
- voice/SKILL.md: 678 to 437 lines.
- voice/references/voice-profile.org: 134 to 1311 lines.
- Net: 1297 insertions, 360 deletions across both files.

Mode-tag conventions: general-only patterns (#1-12, 14-16, 18-31)
tagged [general]. Prose+personal patterns (#33-38, 41) tagged [prose
· personal]. Personal-only patterns (#32, 39, 40) tagged [personal].
Pattern 13 keeps its dual-mode tag (general overuse-reduction vs
prose/personal zero-tolerance).

Corpus-confirmed Basis entries cite the Phase 1 measurements for
patterns 7, 17, 22, 32, 33, 34, 38. All other patterns are tagged
observation-derived with the appropriate source (Wikipedia Signs of
AI Writing, Strunk and White, Orwell, Plain English, Garner, or
Craig's commits.md / interaction.md rules).

Seven em-dashes were caught in the new SKILL.md Rule lines during a
post-migration spot-check and rewritten as periods or colons. The
em-dash on Pattern 13's Rule line stays because the rule references
the symbol literally.

Known follow-up: the profile's prose sections (Problem, Basis,
History) still contain em-dashes carried over from the original
SKILL.md Problem paragraphs. They don't break the loading model but
they do violate the rule the file documents. A separate hygiene pass
can scrub them. The em-dash sweep was not bundled here so the
migration shape stays the deliverable.

Bulk migration was dispatched to a subagent with strict format
requirements. Spot-checks of patterns 1, 13, 17, 32, and 41
confirmed the shape lands correctly across all four mode-tag
conventions.

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