adding script in example which can be used for PR review reminder (#601)

examples/PRReviewReminder.md

@@ -0,0 +1,15 @@
+# PR Review Reminder
+
+## When to use
+
+PRs where user is added as a reviewer and have not commented in last n days can be detected using this script.
+
+## How to use
+
+### Script Mode
+
+1. Invoke the Script with required params-
+
+```cmd
+.\PRReviewReminder.ps1 -organization https://dev.azure.com/fabrikam -username user@fabrikam.com -notReviewedInLastNDays 1 -project fabrikamProject
+```

examples/PRReviewReminder.ps1

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+#---------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+
+param(
+    [String]$organization,
+    [String]$project,
+    [String]$username,
+    [int]$notReviewedInLastNDays
+)
+
+$prlist = az repos pr list --reviewer $username --org $organization -p $project -o json | ConvertFrom-Json
+$prReminderList = @()
+$lastNDays = -1 * $notReviewedInLastNDays
+
+foreach ($pr in $prlist) {
+    $repositoryId = $pr.repository.id
+    $pullrequestId = $pr.pullRequestId
+    $nDaysBefore = (Get-Date).ToUniversalTime().AddDays($lastNDays)
+    $lastUpdatedDate = $nDaysBefore
+    $threads = az devops invoke --area git --resource pullRequestThreads --org $organization --route-parameters repositoryId=$repositoryId pullRequestId=$pullrequestId --http-method GET --api-version 5.1-preview -o json | ConvertFrom-Json
+
+    foreach($thread in $threads.value) {
+        $comments = $thread.comments
+
+        foreach($comment in $comments) {
+            $commentDate = ([datetime]$comment.lastUpdatedDate).ToUniversalTime()
+            if($comment.author.uniqueName -eq $username -and $commentDate -gt $lastUpdatedDate) {
+                $lastUpdatedDate = $commentDate
+            }
+        }
+    }
+
+    if($lastUpdatedDate -eq $nDaysBefore) {
+        $prReminderList += ($pr)
+    }
+}
+
+if($prReminderList.Length -eq 0) {
+    Write-Host "No pull requests pending to be reviewed at this moment.."
+} elseif($prReminderList.Length -gt 0) {
+    Write-Host "Pull requests not reviewed/updated in last "$notReviewedInLastNDays" days:"
+}
+
+foreach($pr in $prReminderList) {
+    Write-Host $pr.pullRequestId $pr.title
+}