Feature: Backrest widget (#5741)

Co-authored-by: Renan Greca <renangreca@gmail.com>
Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

docs/widgets/services/backrest.md

@@ -0,0 +1,17 @@
+---
+title: Backrest
+description: Backrest Widget Configuration
+---
+
+[Backrest](https://garethgeorge.github.io/backrest/) is a web-based frontend for
+the [Restic](https://restic.net/) backup tool.
+
+**Allowed fields:** `["num_success_latest","num_failure_latest","num_success_30","num_plans","num_failure_30","bytes_added_30"]`
+
+```yaml
+widget:
+  type: backrest
+  url: http://backrest.host.or.ip
+  username: admin # optional if auth is enabled in Backrest
+  password: admin # optional if auth is enabled in Backrest
+```

docs/widgets/services/index.md

@@ -15,6 +15,7 @@ You can also find a list of all available service widgets in the sidebar navigat
 - [Authentik](authentik.md)
 - [Autobrr](autobrr.md)
 - [Azure DevOps](azuredevops.md)
+- [Backrest](backrest.md)
 - [Bazarr](bazarr.md)
 - [Beszel](beszel.md)
 - [Caddy](caddy.md)