0xWheatyz b49004bb47 fix(schematic): add voltage regulator, pull-downs, decoupling cap, and enable control
- Add LM7805 (TO-220) with input/output caps to step 12V→5V for ESP32 VIN
- Add 10K pull-down resistors on D5/LIM_A and D4/LIM_C limit switch GPIOs
- Add 100uF electrolytic decoupling capacitor on A4988 VMOT
- Rewire A4988 ~ENABLE from GND to ESP32 D18 via MOTOR_EN net label
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