Added astro-mermaid integration for client-side rendering. Converted: composition diagram (flowchart), IbusHandler state machine (stateDiagram-v2), and OBD-II protocol timeline. Circuit schematic stays ASCII — Mermaid can't do pin-level schematics.
Description
BMW I/K-Bus + OBD-II K-line interface board (ESP32, optocoupler isolated)
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