Adds accessibility/README.md, the player-facing setup and keymap reference --
the thing to read before playtesting.
Brings the developer docs in line with what was actually built:
- docs/README.md rewritten as an index with current status and a one-paragraph
architecture summary.
- docs/scratch.md gains a HANDOFF section: state of play, the commands to run
after any change, the five traps that each cost real debugging time, what is
NOT verified and why, deliberate omissions, and how to rebase onto a future
game version.
- docs/03-implementation-plan.md gains a status banner listing where the
implementation deliberately diverged from the plan (menu narration pulled
forward as a blocker, levelCursorPopup not patched, tryInteract insufficient
as a tracker filter, testbed added, no settings UI built).
- docs/04-open-questions.md gains a resolution banner: Q6 and Q8 remain open.
Also records that the testbed check count varies between runs (23-26) because
some blocks are conditional, so what matters is zero failures rather than the
total.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>