start on encode example

example/encode.js

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+const { Encoders } = require('../');
+const dgram = require('dgram');
+
+const motionBytes = Encoders.RTTrPM(0x01, 0x12345678, [
+  Encoders.Trackable('Test', [Encoders.CentroidPosition(100, 1.0, 2.0, 3.0)], undefined),
+]);
+console.log(motionBytes);
+
+const socket = dgram.createSocket('udp4');
+
+socket.send(motionBytes, 3434, '127.0.0.1', (error) => {
+  if (error) {
+    console.error(error);
+  }
+  socket.close(() => {
+    process.exit();
+  });
+});