lsp: Use available workspace folders in initialize params (#25753)

Closes https://github.com/zed-industries/zed/issues/25743
Closes https://github.com/biomejs/biome-zed/issues/73

Release Notes:

- Fixed issues with launching Svelte/Biome language servers

crates/prettier/src/prettier.rs

@@ -279,6 +279,7 @@ impl Prettier {
             server_binary,
             &prettier_dir,
             None,
+            Default::default(),
             cx.clone(),
         )
         .context("prettier server creation")?;