Add quantity CloudCover

Common/UnitDefinitions/CloudCover.json

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+{
+  "Name": "CloudCover",
+  "BaseUnit": "Fraction",
+  "XmlDoc": "Cloud cover (also known as cloudiness, cloudage, or cloud amount) refers to the fraction of the sky obscured by clouds when observed from a particular location.",
+  "Units": [
+    {
+      "SingularName": "Okta",
+      "PluralName": "Oktas",
+      "FromUnitToBaseFunc": "x * 0.125",
+      "FromBaseToUnitFunc": "UnitsNetMath.Clamp(System.Math.Round(x / 0.125, MidpointRounding.AwayFromZero),0,8)",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "oktas" ]
+        }
+      ]
+    },
+    {
+      "SingularName": "Percent",
+      "PluralName": "Percent",
+      "FromUnitToBaseFunc": "UnitsNetMath.Clamp(x/1e2,0,1)",
+      "FromBaseToUnitFunc": "UnitsNetMath.Clamp(x*1e2,0,1e2)",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "%" ]
+        }
+      ]
+    },
+    {
+      "SingularName": "Fraction",
+      "PluralName": "Fractions",
+      "FromUnitToBaseFunc": "UnitsNetMath.Clamp(x,0,1)",
+      "FromBaseToUnitFunc": "UnitsNetMath.Clamp(x,0,1)",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "" ]
+        }
+      ]
+    }
+  ]
+}

UnitsNet.Tests/CustomCode/CloudCoverTests.cs

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+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by \generate-code.bat.
+//
+//     Changes to this file will be lost when the code is regenerated.
+//     The build server regenerates the code before each build and a pre-build
+//     step will regenerate the code on each local build.
+//
+//     See https://github.com/angularsen/UnitsNet/wiki/Adding-a-New-Unit for how to add or edit units.
+//
+//     Add CustomCode\Quantities\MyQuantity.extra.cs files to add code to generated quantities.
+//     Add UnitDefinitions\MyQuantity.json and run generate-code.bat to generate new units or quantities.
+//
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+// Licensed under MIT No Attribution, see LICENSE file at the root.
+// Copyright 2013 Andreas Gullberg Larsen ([email protected]). Maintained at https://github.com/angularsen/UnitsNet.
+
+using System;
+
+namespace UnitsNet.Tests.CustomCode
+{
+    public class CloudCoverTests : CloudCoverTestsBase
+    {
+        protected override double FractionsInOneFraction => 1;
+        protected override double OktasInOneFraction => 8;
+        protected override double PercentInOneFraction => 1e2;
+        protected override bool SupportsSIUnitSystem => false;
+    }
+}