Initial release: ESP32-C3 CO2 & environment sensor board

KiCad 10 design (schematic, 2-layer layout, custom symbols and footprints),
fabrication data for PCBWay (Gerber X2, Excellon, job file), BOM, generated
documentation (schematic PDF, layer plots, 3D render) and firmware notes.

gerber/esp+sensair-PTH.drl

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