Add LED control and several other macros

macros/Diagnostics/MotorTest

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+; Commissioning
+; During commissioning, you can test the X and Y motors independently by using the S2 modifier on the G1 command, like this:
+;
+M291 S3 R"Are you sure?" P"Commissioning: Testing X and Y motors."
+M291 S3 R"Ensure clearance." P"This will move the motors in all directions."
+M291 S1 T10 R"Testing..." P"Motors should move 10mm back and forth."
+G91 		; relative mode
+G1 S2 X10 	; move the X motor forward 10mm
+G1 S2 X-10 	; move the X motor back 10mm
+G1 S2 Y10 	; move the Y motor forward 10mm
+G1 S2 Y-10 	; move the Y motor back 10mm
+G90 		; back to absolute mode