Add info on deleting a project to Manage Projects page (#2456)

* Add info on deleting a project

Fortunately we already have this componentized (🙌🏻). It makes sense to include it directly on the Manage Projects page as well, since deletion is part of management.

* hmm yes importing the component is also required

Author: armchairlinguist

docs/deployment/manage-projects.md

@@ -8,6 +8,8 @@ tags:
  - Semgrep AppSec Platform
 ---
 
+import DeleteAProject from "/src/components/procedure/_delete-a-project.md"
+
 # Manage projects
 
 View, sort, and tag your projects through the **Projects** page. Refer to this page to manage and troubleshoot thousands of repositories by identifying scan issues or scans with a high number of findings.
@@ -91,3 +93,9 @@ See the following pages for more information:
 - For Semgrep Managed Scans users: [configure your scans](/deployment/managed-scanning/overview).
 - [Set a primary branch](/deployment/primary-branch).
 - [Set tags](/semgrep-appsec-platform/tags).
+
+## Delete a project
+
+Deleting a project removes all of its findings, metadata, and other records from Semgrep AppSec Platform.
+
+<DeleteAProject />