- Added save insulin delivery sample documentation

Author: GGGava

docs/saveInsulinDeliverySample.md

@@ -0,0 +1,42 @@
+# saveBloodGlucoseSample
+
+Save a insulin delivery value to HealthKit.
+
+`saveInsulinDeliverySample` accepts an options object containing insulin sample data and a callback:
+
+Example input object:
+
+```javascript
+let input = {
+    value: 10, // IU
+    startDate: '2021-03-22T16:19:00.000-0300', // Optional, defaults to now
+    endDate: '2021-03-22T16:19:00.000-0300', // Optional, defaults to startDate
+    metadata: {
+      HKBloodGlucoseMealTime: 1, //Basal = 1, Bolus = 2
+      anyOtherKey: 'some data', // supports string, number, boolean
+    }
+}
+```
+
+Insulin delivery samples are always in International Units.
+
+Example usage:
+
+```javascript
+AppleHealthKit.saveInsulinDeliverySample(
+  input,
+  (err: Object, result: string) => {
+    if (err) {
+      return
+    }
+    // insulin delivery successfully saved
+    console.log(result)
+  },
+)
+```
+
+Example output (record's UUID):
+
+```json
+"619E37D3-C675-4186-B6A4-395EBFC6F46D"
+```