add luasnip

snippets/rust.json

@@ -0,0 +1,10 @@
+{
+  "Rust Derive": {
+    "prefix": "derive",
+    "body": [
+      "#[derive(Debug, Clone$1)]"
+    ],
+    "description": "Insert #[derive(...)] with cursor inside parentheses"
+  }
+}
+