website/integrations: add openproject (#13838)

* Added scope mapping section

* Updated formatting

* Bolded UI elements

* Update website/integrations/services/openproject/index.md

Signed-off-by: Tana M Berry <tanamarieberry@yahoo.com>

* Update website/integrations/services/openproject/index.md

Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com>
Signed-off-by: Dewi Roberts <dewi@goauthentik.io>

* Update website/integrations/services/openproject/index.md

Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com>
Signed-off-by: Dewi Roberts <dewi@goauthentik.io>

* Update website/integrations/services/openproject/index.md

Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com>
Signed-off-by: Dewi Roberts <dewi@goauthentik.io>

* Indented code block

---------

Signed-off-by: Tana M Berry <tanamarieberry@yahoo.com>
Signed-off-by: Dewi Roberts <dewi@goauthentik.io>
Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com>

website/sidebarsIntegrations.js

@@ -34,6 +34,7 @@ module.exports = {
                         "services/mobilizon/index",
                         "services/nextcloud/index",
                         "services/onlyoffice/index",
+                        "services/openproject/index",
                         "services/outline/index",
                         "services/owncloud/index",
                         "services/paperless-ng/index",