Add documentation on how to use coverlet (#85)

Author: Corniel

README.md

@@ -145,6 +145,7 @@ reported a the [GibHub repository](https://github.com/dotnet-project-file-analyz
 ### Other
 * [**Proj1100** Avoid using Moq](rules/Proj1100.md)
 * [**Proj1101** Package references should have stable versions](rules/Proj1101.md)
+* [**Proj1102** Use Coverlet Collector or MSBuild](rules/Proj1102.md)
 * [**Proj1200** Exclude private assets as project file dependency](rules/Proj1200.md)
 
 ## Resource file rules

rules/Proj1102.md

@@ -0,0 +1,58 @@
+---
+parent: Other
+ancestor: MSBuild
+---
+
+# Proj1102: Use Coverlet Collector or MSBuild
+[Coverlet](https://github.com/coverlet-coverage/coverlet) is a cross-platform
+code coverage framework for .NET, with support for line, branch and method
+coverage. The packages `coverlet.collector` and `coverlet.msbuild` have the
+same purpose but should not be used together. Note that `coverlet.collector` is
+preferred over the `coverlet.msbuild`.
+
+## Non-compliant
+``` xml
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" PrivateAssets="all" />
+	<PackageReference Include="coverlet.msbuild" PrivateAssets="all" />
+  </ItemGroup>
+
+</Project>
+```
+
+## Compliant
+``` xml
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" PrivateAssets="all" />
+  </ItemGroup>
+
+</Project>
+```
+
+or
+
+``` xml
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.msbuild" PrivateAssets="all" />
+  </ItemGroup>
+
+</Project>
+```