docs(readme): add logo, drop redundant concept section, trim asides

[jeqcho]

Summary

Three README improvements, one commit each:

1. Logo. Adds the Inspect Robots logo (the robot-inspecting-a-dot product art from robocurve/website) centered above the title. Committed at docs/assets/inspect-robots-logo.svg with one adaptation: a cream rounded-tile background, so the cream-filled head circle reads on GitHub dark mode and PyPI instead of assuming the site's cream page. The blinking-eye CSS animation is kept and honors prefers-reduced-motion. The README references it by absolute raw.githubusercontent.com/.../main/... URL because README.md is also the PyPI long description (via hatch-fancy-pypi-readme), where relative paths break — so the image 404s until this merges.

2. Drop "One framework, two swappable inputs". The two-inputs concept already appears in the tagline, the Inspect AI mapping table, and the Python example's comment, and the docs landing page leads with the same section — so Install moves up under the fold. The one detail stated nowhere else, the pre-rollout (policy, embodiment) compatibility check, moves to a "Why Inspect Robots" bullet.

3. Trim over-explaining asides. Cuts detail a reader acting on each section doesn't need: the PEP 668 parenthetical, the uv-run re-sync play-by-play, the Rerun viewer memory-cap/upgrade note, the .env precedence rules, and the CaP-X adapter spec-sheet (deferred to the plugin README). Kept: the MolmoAct2 server warning, the safety-guardrails paragraph, and the Development uv lock blockquote (CONTRIBUTING.md does not cover that gotcha).

Changes

• Add docs/assets/inspect-robots-logo.svg and reference it atop the README
• Remove the "One framework, two swappable inputs" section; add a "Compatibility checked up front" bullet to "Why Inspect Robots"
• Tighten Install, the uv-run note, the Rerun paragraph, agent .env setup, and the CaP-X section

Checklist

• pre-commit install done; hooks pass (or ran pre-commit run --all-files)
• Tests added/updated — N/A, docs-only
• Coverage stays at 100% (pytest --cov, ran via the pre-push hook)
• ruff check . and ruff format --check . pass (no Python files touched)
• mypy passes (strict) — no Python files touched
• CHANGELOG.md updated under "Unreleased" — N/A, docs-only (matches docs: add _html.py and view to the module map #138 precedent)
• Public API changes — N/A
• Core stays NumPy-only — no dependency changes

Related

None — standalone docs change.

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