Docs still describe deleted cli.py + _bin/ layout (followup to #7/#9)

[zackees]

Doc drift after #7

Same root cause as #9 (which I just closed) — packaging refactor #7 left stale references in artifact-walking tools. #9 fixed the runtime-test + CI-gate cases. This issue covers the documentation cases. Same failure shape as fbuild#748: the wheel-build path is correct but downstream readers (humans + agents + linters) see a description of a layout that no longer exists.

git grep -n '_bin\|cli\.py\|template_python_rust_cmd\.cli' \*.md \*\*/\*.md finds:

• README.md:46-47 — tree diagram shows cli.py and _bin/ as part of the package layout. Both deleted in fix(install): ship template-cli as raw wheel script; drop Python shim #7.
• README.md:95 — describes "`fbuild` console script, staged into `src/template_python_rust_cmd/_bin/`". Stale on both counts.
• CLAUDE.md:79,85 — "The Python CLI shim in `src/template_python_rust_cmd/cli.py` stays thin" + "The release pipeline stages the compiled `template-cli` binary into `src/template_python_rust_cmd/_bin/`". Both gone.
• ENHANCE.md:37 — "The Python CLI shim in `src/template_python_rust_cmd/cli.py` stays tiny". Gone.
• crates/template-cli/README.md:5 — "staged into `src/template_python_rust_cmd/_bin/` by `ci/build_wheel.py`". Gone.
• docs/ARCHITECTURE.md:9 — "packaged at `template_python_rust_cmd._bin/`". Gone.
• docs/ARCHITECTURE.md:66 — "CLI shim that finds and execs the packaged native binary (`cli.py`)". Gone.
• docs/RELEASE.md:18 — "`src/template_python_rust_cmd/_bin/`, drives maturin to produce". Gone.

Why this matters

A downstream consumer reading any of these files gets a description of how the binary used to be packaged. The actual mechanism (raw wheel script at <name>-<ver>.data/scripts/) is described correctly in src/template_python_rust_cmd/README.md and the comments in ci/build_wheel.py, but the top-level entry points (README.md, CLAUDE.md, docs/ARCHITECTURE.md) still describe the dead shape. Agent docs are particularly load-bearing here — CLAUDE.md is the routing document for any agent doing work in this repo.

Fix

Replace every cli.py / _bin/ reference with the actual current shape:

• The package no longer has a CLI shim. template-cli[.exe] is installed directly into the venv's Scripts/ / bin/ by pip via the wheel's <name>-<ver>.data/scripts/ raw-script mechanism. See src/template_python_rust_cmd/README.md for the full rationale.
• The build pipeline: ci/build_wheel.py builds template-cli via cargo, then post-processes the maturin-emitted wheel to inject the binary at <name>-<ver>.data/scripts/ and update RECORD.
• Where docs explicitly say "two consumption stories: Python in-process API + CLI command", that's still right — but the CLI story is now "template-cli on PATH after install", not "Python shim that subprocess-launches a packaged binary".

Acceptance

grep -rn '_bin\|template_python_rust_cmd\.cli\|cli\.py' README.md CLAUDE.md ENHANCE.md docs/ crates/template-cli/README.md returns either:

• no matches, OR
• only historical context (e.g., a CHANGELOG entry explaining the migration).

Refs #7 (refactor that caused it), #9 (tests + gate cleanup), fbuild#748 (same failure shape).