Migrate docs from the other repo

docs/reference/js/orientation.md

@@ -0,0 +1,46 @@
+# micro:bit orientation
+
+A #microbit library that exposes accelerometer events.
+
+A simple library that exposes events to detect
+
+* detect that the screen is facing up and the board is horizontal
+
+```
+onScreenUp(() => {
+    micro_bit.showString("screen up", 100)
+})
+```
+
+* detect that the screen is facing down and the board is horizontal
+
+```
+onScreenDown(() => {
+    micro_bit.showString("screen down", 100)
+})
+```
+
+* detect when the logo is up and the board is vertical
+
+```
+onLogoUp(() => {
+    micro_bit.showString("logo up", 100)
+})
+```
+
+* detect when the logo is down and the board is vertical
+
+```
+onLogoDown(() => {
+    micro_bit.showString("r", 100)
+})
+```
+
+* detect that the device is shaken
+
+```
+onShake(() => {
+    micro_bit.showString("shake", 100)
+})
+```
+