v0.8.1

Patch: OpenAI gpt-5.6 family price rows — gpt-5.6-sol ($5.00 in / $0.50 cached /
$30.00 out per 1M), gpt-5.6-terra ($2.50 / $0.25 / $15.00), gpt-5.6-luna ($1.00 /
$0.10 / $6.00); Standard short-context tier, effective 2026-07-09, every row cited to
the official OpenAI pricing page (PR #223). Codex CLI sessions on these models — which
rendered tokens-only under I2's no-fabricated-dollars rule — now price in receipts and
the statusline. Additive data change only; no code touched.

Also: the README was restructured around a features-first flow with an agent-assisted
install section ("point your agent at this README and it installs + wires the
statusline"), contributed in PR #213. Docs-only; ships as the npm package README.