Enable CSS, JSON, Python, and Tailwind to lookup LSP installed in PATH (#22037)

Co-authored-by: Peter Tripp <peter@zed.dev>

crates/languages/src/json.rs

@@ -149,6 +149,24 @@ impl LspAdapter for JsonLspAdapter {
         LanguageServerName("json-language-server".into())
     }
 
+    async fn check_if_user_installed(
+        &self,
+        delegate: &dyn LspAdapterDelegate,
+        _: Arc<dyn LanguageToolchainStore>,
+        _: &AsyncApp,
+    ) -> Option<LanguageServerBinary> {
+        let path = delegate
+            .which("vscode-json-language-server".as_ref())
+            .await?;
+        let env = delegate.shell_env().await;
+
+        Some(LanguageServerBinary {
+            path,
+            env: Some(env),
+            arguments: vec!["--stdio".into()],
+        })
+    }
+
     async fn fetch_latest_server_version(
         &self,
         _: &dyn LspAdapterDelegate,