updated walkthrough

Author: Tim Gilboy

package.json

@@ -103,6 +103,14 @@
 							"onCommand:sourcery.welcome.open"
 						]
 					},
+					{
+						"id": "sourcery.codeReviews",
+						"title": "Review Your PRs with Sourcery",
+						"description": "Add Sourcery to your GitHub repos to get instant, in depth code reviews on every pull request.",
+						"media": {
+							"markdown": "walkthrough/code_reviews.md"
+						}
+					},					
 					{
 						"id": "sourcery.acceptRecommendation",
 						"title": "Use Sourcery's In-Line Suggestions",

walkthrough/Sourcery_Code_Review.gif

@@ -0,0 +1,13 @@
+You can add Sourcery to your GitHub or GitLab repos to get immediate code review feedback on every pull/merge request.
+
+![Sourcery Code Reviews](Sourcery_Code_Review.gif)
+
+## GitHub Code Reviews
+You can [directly add the Sourcery GitHub integration](https://github.com/apps/sourcery-ai/installations/new ) to any repo.
+
+
+## GitLab Code Reviews
+You can run Sourcery code reviews as part of your CI to get reviews on every GitLab MR. [Follow the instructions in our documentation](https://docs.sourcery.ai/Code-Review/Getting-Started/GitLab/) to set up Sourcery for GitLab.
+
+## Code Reviews for Other Platforms
+Sourcery is not yet available for Bitbucket or other platforms, but you can [sign up for our waitlist](https://research.typeform.com/to/GoVM9jYf) to get early access when it's available.