fix: restore 'all 97 bindings' claim dropped by README rewrite

[fuleinist]

Summary

Commit 4a610f1 ('Add beginner onboarding guidance') rewrote README.md and removed the all 97 bindings phrase from the shortcuts row in the 'Where to go' table. This breaks documentation.test.mjs's forward CLAIMS sweep, which declares:

['README.md', 'bindings', (n) => `all ${n} bindings`]

The suite fails on:

FAIL README.md says 'all 97 bindings'
  got false, wanted something truthy

(See CI run: https://github.com/SYKhayyat/ksav/actions/runs/33024821831 — 106 files · 7564 passed, 1 failed.)

Fix

Restore the binding-count claim on the shortcuts row, matching the pre-rewrite phrasing. The count 97 matches Object.keys(DEFAULT_KEYS).length in ksav/app/src/bindings.ts (lines 28–364, 97 key-value entries).

-| **learn the keyboard** | [`docs/shortcuts.md`](docs/shortcuts.md) |
+| **learn the keyboard** | [`docs/shortcuts.md`](docs/shortcuts.md) — all 97 bindings in both languages, generated from the source |

The parallel claim in docs/start-here.md was not touched by the rewrite and still reads correctly (all 97 bindings).

Verification

• grep -cE '^\s+\S+:\s*"' ksav/app/src/bindings.ts between the DEFAULT_KEYS braces → 97.
• grep 'all.*bindings' README.md docs/start-here.md now returns all 97 bindings on both pages, matching what docfacts.mjs expects.
• The documentation-test fence is declarative over markdown, so CI green follows from the regex match.

Fixes #10.