Add instructions for configuring Helix to use ruff-lsp alongside an…

…other language server such as `pyright`. (#261)

README.md

@@ -166,6 +166,24 @@ Upon successful installation, you should see errors surfaced directly in your ed
 
 ![](https://user-images.githubusercontent.com/1309177/209262106-71e34f8d-73cc-4889-89f7-3f54a4481c52.png)
 
+Future versions of Helix support the use of multiple language servers. The following configuration
+would enable the use of `ruff-lsp` alongside a language server like `pyright`:
+
+```toml
+[[language]]
+name = "python"
+roots = ["pyproject.toml"]
+language-servers = ["pyright", "ruff"]
+
+[language-server.pyright]
+command = "pyright-langserver"
+args = ["--stdio"]
+
+[language-server.ruff]
+command = "ruff-lsp"
+config = { settings = { run = "onSave" } }
+```
+
 ### Example: Lapce
 
 To use `ruff-lsp` with [Lapce](https://lapce.dev/), install the [`lapce-ruff-lsp`](https://plugins.lapce.dev/plugins/abreumatheus/lapce-ruff-lsp)