Add docs for addRange function

Signed-off-by: David Arendsen <darendsen@gamepoint.com>

docs/04-functions.md

@@ -9,4 +9,5 @@ On this page you will find the methods you can use in the query builder.
 * [addGroup()](functions/addGroup.md)
 * [addLimit()](functions/addLimit.md)
 * [addMean()](functions/addMean.md)
+* [addRange()](functions/addRange.md)
 * [addRawFunction()](functions/addRawFunction.md)

docs/functions/addRange.md

@@ -0,0 +1,51 @@
+# Flux Query Builder Docs
+
+## Functions » addRange()
+
+### Parameters:
+
+<table>
+  <tbody>
+    <tr>
+      <th>Name</th>
+      <th>Required</th>
+      <th>Data type</th>
+      <th>Description</th>
+    </tr>
+    <tr>
+      <td>start</td>
+      <td>Yes</td>
+      <td>DateTime</td>
+      <td>Earliest time to include in results.</td>
+    </tr>
+    <tr>
+      <td>stop</td>
+      <td>No</td>
+      <td>DateTime</td>
+      <td>Latest time to include in results. Default is the current time.</td>
+    </tr>
+  </tbody>
+</table>
+
+
+### Example
+
+```php
+->addRange(
+    new DateTime('2022-08-12 18:00:00'),
+    new DateTime('2022-08-12 20:00:00')
+)
+```
+
+This will result in the following Flux function part:
+
+```
+|> range(
+  start: time(v: 2022-08-12T18:00:00Z), 
+  stop: time(v: 2022-08-12T20:00:00Z)
+)
+```
+
+### Extra resources
+
+* [Flux documentation](https://docs.influxdata.com/flux/v0.x/stdlib/universe/range/)