Summary

Adds project documentation and brings the public README up to date with the v1.3.0 timed-motor features.

• README.md (supplement, existing content preserved): new sections for motor types (bidirectional vs timed), manual device entry by hex ID, the event-free timed calibration flow, and driving a calibrated timed motor to a position.
• docs/ARCHITECTURE.md — component responsibilities, serial protocol layer, dispatcher/signal flow, bidirectional-vs-timed control split, position tracking, calibration persistence.
• docs/GETTING-STARTED.md — end-user quick start (install → hub setup → add/pair → calibrate → control).
• docs/DEVELOPMENT.md — contributor setup, the WSL-tests / native-.venv-win ruff+mypy split, conventions, module layout.
• docs/TESTING.md — exact .wsl_exec.sh invocation (with the PowerShell vs Git Bash MSYS_NO_PATHCONV caveat), test-file map, coverage, lint/type gate.
• docs/CONFIGURATION.md — every real config option, sourced from const.py / manifest.json / the flows.

Docs-only change — no code, no version bump. All technical claims were spot-checked against the codebase (constants, VID/PID, baud, and the WSL test commands).

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