Add JSON LSP plugin

plugins/json_language/src/lib.rs

@@ -6,7 +6,7 @@ use std::path::PathBuf;
 
 // #[import]
 fn command(string: &str) -> Option<String> {
-    todo!()
+    None
 }
 
 // TODO: some sort of macro to generate ABI bindings
@@ -113,6 +113,11 @@ pub fn cached_server_binary(container_dir: PathBuf) -> Option<PathBuf> {
     }
 }
 
+#[bind]
+pub fn label_for_completion(label: String) -> Option<String> {
+    None
+}
+
 #[bind]
 pub fn initialization_options() -> Option<String> {
     Some("{ \"provideFormatter\": true }".to_string())