feat(make-pdf): --to html|docx output formats

--to html writes the assembled self-contained document directly (no print
round-trip): inline vector diagrams, data-URI images, zero network
references, plus an @media screen layer for browser reading. --to docx is
the content-fidelity export (eng-review P8): html-to-docx@1.8.0 (exact pin;
pure JS, bun-compile-verified) maps headings/tables/code/lists; diagrams and
SVG images rasterize at 300dpi of the content-box width via the render tab;
diagnostic figures convert to plain p/pre so the converter can't silently
drop an error. --format keeps its page-size-alias meaning; --to is the
output format, and the CLI says so when confused.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

package.json

@@ -48,6 +48,7 @@
     "@huggingface/transformers": "^4.1.0",
     "@ngrok/ngrok": "^1.7.0",
     "diff": "^7.0.0",
+    "html-to-docx": "1.8.0",
     "marked": "^18.0.2",
     "playwright": "^1.58.2",
     "puppeteer-core": "^24.40.0",