Esp32 S3

Drive an ESP32-S3 from swamp over USB serial. One model type, s3-device, speaks a JSON line protocol: one command line in, one JSON object out. It knows nothing about what the board is attached to, so it serves a bare S3 as well as one carrying sensors or a display, and records every exchange as versioned data with an explicit outcome. Screen-specific methods live in @vcjdeboer/s3-panel, which builds on the same base.

Wi-Fi methods wifi, configure (SSID and password sensitive, from a vault) and forget. send refuses line breaks and config set with Wi-Fi credentials; write refuses them per line; configure masks credentials in board errors.