Robot: Teensy 3.6 with the old robot's servo wiring and calibration

- LEGACY/Hexapod_Teensy/: old robot sketch (reference only).
- platformio.ini: robot env targets teensy36 (owner-confirmed board).
- Config.h: per-servo SERVOS table (pin, pulse at 0 deg, signed
  us/deg, pulse limits) built from the old sketch's pins, ranges, trims
  and the old Unity servo directions. Rear-left/front-left coxa offsets
  set to 0: the owner re-horns those two servos (the old +-90 left them
  at the end of travel; the sim showed them clamping).
- ServoDriver: 18 servos on hardware PWM (50 Hz, 16-bit); the Teensy 3.6
  Servo library stops at 12.
- Radio on CE 39 / CSN 15 with SPI SCK on pin 14.
- sim: analogWrite/PWM shims, pulses decoded through SERVOS (API v6).
- Docs: CLAUDE.md, READMEs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-current/LEGACY/Hexapod_Teensy/TransferDataStructure.h

@@ -0,0 +1,29 @@
+#ifndef dataStruct
+#define dataStruct
+
+struct __attribute__((__packed__)) dataStruct2
+{
+  bool STOP = false;
+
+  float walkSpeed = 10; //step size
+  float walkSpeed2 = 0; //gate speed
+  float walkRotation = 0 ;
+  float walkDirection = 0;
+
+  float tranform[3] = {0, 0, 0};
+  float tranform2[3] = {0, 0, 0};
+  float rotation[3] = {0, 0, 0};
+
+  bool remotePasstroughControl = true;
+  float servoPositions[18] = {
+    90, 90, 90,
+    90, 90, 90,
+    90, 90, 90,
+
+    90, 90, 90,
+    90, 90, 90,
+    90, 90, 90
+  };
+} dataStruct;
+
+#endif