PackageJson: Prettify markdown/mdx on commit with lint-staged (#37616)

* Format md,mdx files with prettier on lint-staged

* Manually run prettier on docs/sources

docs/sources/developers/plugins/backend/plugin-protocol.md

@@ -20,6 +20,7 @@ Because Grafana maintains the plugin protocol, the plugin protocol attempts to f
 ## Writing plugins without Go
 
 If you want to write a backend plugin in another language than Go, then it’s possible as long as the language supports [gRPC](https://grpc.io/). However, writing a plugin in Go is recommended and has several advantages that should be carefully taken into account before proceeding:
+
 - There's an official [SDK]({{< relref "grafana-plugin-sdk-for-go.md" >}}) available.
 - Single binary as the compiled output.
 - Building and compiling for multiple platforms is easy.