Github integration (#6414)

Co-authored-by: Tom Moor <tom.moor@gmail.com>

plugins/github/server/uninstall.ts

@@ -0,0 +1,15 @@
+import { IntegrationService, IntegrationType } from "@shared/types";
+import { Integration } from "@server/models";
+import { githubApp } from "./github";
+
+export async function uninstall(
+  integration: Integration<IntegrationType.Embed>
+) {
+  if (integration.service === IntegrationService.GitHub) {
+    const installationId = integration.settings?.github?.installation.id;
+
+    if (installationId) {
+      return githubApp.deleteInstallation(installationId);
+    }
+  }
+}