Feature: add gitea widget (#2968)

docs/widgets/services/gitea.md

@@ -0,0 +1,17 @@
+---
+title: Gitea
+description: Gitea Widget Configuration
+---
+
+Learn more about [Gitea](https://gitea.com).
+
+API token requires `notifications` and `repository` permissions. See the [gitea documentation](https://docs.gitea.com/development/api-usage#generating-and-listing-api-tokens) for details on generating tokens.
+
+Allowed fields: ["notifications", "issues", "pulls"]
+
+```yaml
+widget:
+  type: gitea
+  url: http://gitea.host.or.ip:port
+  key: giteaapitoken
+```