v0.27.6 — The ending gets its own backdrop

Added

• The barrow interior is drawn. Winning the game now renders against the barrow-interior
  backdrop instead of the barrow's outside wall. The art shipped with the backdrop pass months ago
  but nothing had ever referenced it — Zork I models no room inside the barrow, so there was no
  room id to key it on. The winning frames are keyed on the win itself; the frame the Hero speaks
  his last line from, at the door, is still the exterior.

Changed — repository preparation for the public release

• docs/ reorganized. A new docs/README.md index says which documents are specifications,
  which are working documents, and which are history; four superseded planning documents moved to
  docs/archive/ with a note on what replaced each.
• The root README rewritten for someone arriving cold: what the project is, a sample comic
  strip, a link to the live site, a status table, and how to run it locally.
• verification/README.md added — how parity is established against the original 1980s binary,
  and what "143/143 strict" does and does not mean.
• Licensing accuracy. NOTICE and THIRD_PARTY.md now record that Comic Chat's character art
  is decoded and redistributed as the sprite sheets the browser draws, and separate it from the
  room backdrops in the same folder, which are original assets. The Comic Neue font ships with its
  OFL license text, as OFL-1.1 requires.

The project remains under the Apache License 2.0.