Add CLAUDE.md with pre-PR check playbook

[btshrewsbury-viam]

Summary

• Adds CLAUDE.md at the repo root documenting the four required pre-PR checks (prettier, markdownlint, vale, make build-prod) with ordering rationale and an optional browser spot-check step.
• Intended as a handoff document for new contributors (and for Claude) so the checks get run consistently before a PR is opened.

Test plan

• Reviewer to confirm the commands and ordering match current tooling expectations.
• Reviewer to confirm the repo-root location is preferred vs. a subdirectory.

🤖 Generated with Claude Code

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[viambot]

It looks like the following files may have been renamed. Please ensure you set all needed aliases:
rename docs/motion-planning/{frame-system => }/camera-calibration.md (64%) rename docs/motion-planning/{move-an-arm => }/constraints.md (48%) rename docs/{vision/3d-vision => motion-planning/frame-system-how-to}/_index.md (10%) rename docs/motion-planning/{frame-system => frame-system-how-to}/arm-fixed-camera.md (64%) rename docs/motion-planning/{frame-system => frame-system-how-to}/arm-gripper-camera.md (54%) rename docs/motion-planning/{frame-system => frame-system-how-to}/mobile-base-arm.md (54%) rename docs/motion-planning/{frame-system => frame-system-how-to}/mobile-base-sensors.md (67%) rename docs/motion-planning/{frame-system/overview.md => frame-system.md} (42%) rename docs/motion-planning/{obstacles => motion-how-to}/avoid-obstacles.md (54%) rename docs/motion-planning/{monitor-a-running-plan.md => motion-how-to/monitor-plan-execution.md} (14%) rename docs/motion-planning/{move-an-arm/move-to-pose.md => motion-how-to/move-arm-to-pose.md} (78%) rename docs/motion-planning/{move-an-arm/move-with-constraints.md => motion-how-to/move-arm-with-constraints.md} (52%) rename docs/motion-planning/{ => motion-how-to}/move-gantry.md (48%) rename docs/motion-planning/{move-an-arm => motion-how-to}/pick-an-object.md (53%) rename docs/motion-planning/{move-an-arm => motion-how-to}/place-an-object.md (36%) rename docs/motion-planning/{obstacles/overview.md => obstacles.md} (17%) rename docs/operate/hello-world/first-project/{sim-setup.md => gazebo-setup.md} (73%) rename docs/{build-apps/app-tutorials/_index.md => operate/mobility/define-dynamic-obstacles.md} (22%) rename docs/{motion-planning/move-an-arm => operate/mobility/move-arm}/_index.md (14%) rename docs/{reference/services/vision/detections-to-segments.md => operate/reference/services/vision/detector_3d_segmenter.md} (14%) rename docs/{motion-planning/obstacles/_index.md => reference/account/accounts.md} (19%) rename docs/{motion-planning/frame-system/_index.md => reference/account/organize.md} (18%) rename docs/{build-apps/tasks/_index.md => reference/advanced-modules/create-subtype.md} (13%) rename docs/reference/components/camera/{micro-rdk/_index.md => esp32-camera.md} (11%) rename docs/reference/components/camera/{micro-rdk/fake.md => fake-micro-server.md} (17%) rename docs/{build-apps/hosting/_index.md => reference/configuration/controls-package.md} (11%) rename docs/{build-apps/setup/_index.md => reference/configuration/kinematic-chain-config.md} (10%) rename docs/reference/{ => configuration}/triggers.md (97%) rename docs/{build-apps/concepts/_index.md => reference/glossary_tmp/viam-agent.md} (19%) rename docs/reference/{components/motor/micro-rdk => platform/viam-server}/_index.md (11%) rename docs/vision/{object-detection => }/act-on-detections.md (73%) rename docs/vision/{object-detection => }/alert-on-detections.md (55%) rename docs/vision/{object-detection => }/detect.md (86%) rename docs/vision/{3d-vision => }/measure-depth.md (64%) rename docs/vision/{object-detection => }/track.md (12%)