Templating (#43)

Add new `templating` crate with custom parser/renderer for dealing with
variables

src-tauri/src/http_request.rs

@@ -106,7 +106,7 @@ pub async fn send_http_request(
                 format!("Failed to parse URL \"{}\": {}", url_string, e.to_string()),
                 window,
             )
-                .await;
+            .await;
         }
     };