Add Japanese translations for Sense HAT node (#704)

hardware/sensehat/locales/en-US/sensehat.json

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+{
+    "sensehat": {
+        "label": {
+            "outputs": "Outputs",
+            "motionEvents": "Motion events",
+            "motionEventsExamples": "accelerometer, gyroscope, magnetometer, compass",
+            "environmentEvents": "Environment events",
+            "environmentEventsExamples": "temperature, humidity, pressure",
+            "joystickEvents": "Joystick events"
+        }
+    }
+}

hardware/sensehat/locales/ja/sensehat.json

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+{
+    "sensehat": {
+        "label": {
+            "outputs": "出力",
+            "motionEvents": "モーションイベント",
+            "motionEventsExamples": "加速度計、ジャイロスコープ、磁力計、方位計",
+            "environmentEvents": "環境イベント",
+            "environmentEventsExamples": "温度、湿度、気圧",
+            "joystickEvents": "ジョイスティックイベント"
+        }
+    }
+}