ry5088-flasher

Reverse-engineer / add support for a NEW RongYuan RY5088 magnetic (Hall-effect or TMR) keyboard from a connected device, producing a firmware/profiles/<dev_id>.toml board profile for this repo. Use when a contributor plugs in an unsupported RY5088 board (Artery AT32F405 + Panchip PAN1080) and wants to: detect its dev_id, fetch + statically analyze the stock firmware, draft a profile by copying the 2307 reference, then build and validate it. NOT for boards that change the MCU or vendor protocol — the YiChip YC3121 (MG75S HE, M1W HE, M1 V5 VIA) or YC500 (ICE75) boards, or the separate 2.4 GHz dongle — which are out of scope.