Apply the team stylecop rules

**Describe the bug**
We have stylecop rules for this project, but it's not included in the build.

**Expected behavior**
We need to include the team-specific rules into the project so the build picks it up.

They are:

```xml

```

And the file header needs to be added:

```js
"documentationRules": {
"companyName": "The .NET Foundation",
"xmlHeader": false,
"documentationCulture": "en-US",
"headerDecoration": "-----------------------------------------------------------------------",
"copyrightText": "{headerDecoration}\nLicensed to {companyName} under one or more agreements.\n{companyName} licenses this file to you under the MIT license.\r\n{headerDecoration}",
"variables": {
"headerDecoration": "-----------------------------------------------------------------------"
}
},
```