Added TMC2209 support (#727)

TMC2209: Added TMC2209 support

tmc2209/stealthchop.go

@@ -0,0 +1,25 @@
+package tmc2209
+
+func EnableStealthChop() {
+	// Set StealthChop enabled in the global config register
+}
+
+func DisableStealthChop() {
+	// Set StealthChop disabled in the global config register
+}
+
+func EnableCoolStep(lowerThreshold, upperThreshold uint8) {
+	// Enable CoolStep with specified thresholds
+}
+
+func DisableCoolStep() {
+	// Disable CoolStep feature
+}
+
+func EnableAutomaticCurrentScaling() {
+	// Enable Automatic Current Scaling
+}
+
+func DisableAutomaticCurrentScaling() {
+	// Disable Automatic Current Scaling
+}