docs(readme): README v2, nothing collapsed, one carrier per fact

[jothimani-rajendran]

What

RW-7b (org-plan plan/readme-v2.md). Every <details> block is removed, and panels whose facts the visible text already carries are dropped. The hero stays. When open-coder-ai/chock#244 merges it becomes the context-report wordmark and mark, without the tagline, at 1760×380 (same file name). Alt text: "context-report wordmark and mark on a dusk-blue background."

Panel	Decision	Reason
cover-context-report	keep (hero)	wordmark-only hero after chock#244; the tagline duplicated the H1
appsec	drop	the section's text table carries the areas, policies and tiers
adopt	drop	"Two ways to adopt it" carries both routes and their commands
layers	drop	How it works holds the same layer rows verbatim
honest	drop	"Guardrails, not guarantees" carries the tiers
family	drop	"Part of open-coder-ai" table lists all 13 repositories

The repo's own demo GIF and the docs/figures and paper/figures charts are unchanged (they are not shared panels).

Definition of done

$ grep -c "<details" README.md
0
$ grep -n -i -F -e "pip install chock" -e "free forever" -e "never leaves" -e "would have prevented" -e "[stars]" -e "rtk" -e "hallucinat" -e "100%" -e "removes the findings" -e "never sends" README.md | grep -v 'width="100%"'
(empty)
$ pytest -q $(grep -rln README tests --include=*.py)
59 passed, 1 skipped in 9.79s

README: 357 lines, 2,968 words (wc). Ruff, schema and policies are untouched.

Claims

No row or claim changes; README layout only.

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