Add setupReleaseTools.ps1 script

This installs the necessary modules and authenticates using a given
GitHub token so that the Azure pipelines can use our `ReleaseTools`
module to publish to GitHub.

Author: andyleejordan

tools/setupReleaseTools.ps1

@@ -0,0 +1,17 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+param(
+    [Parameter(Mandatory)]
+    [string]$Token
+)
+
+Write-Host "Install and import PowerShell modules"
+Set-PSRepository -Name PSGallery -InstallationPolicy Trusted | Out-Null
+Install-Module -Name PowerShellForGitHub -Scope CurrentUser -Force
+Import-Module $PSScriptRoot/ReleaseTools.psm1
+
+Write-Host "Setup authentication"
+Set-GitHubConfiguration -SuppressTelemetryReminder
+$password = ConvertTo-SecureString -String $Token -AsPlainText -Force
+Set-GitHubAuthentication -Credential (New-Object System.Management.Automation.PSCredential ("token", $password))