Added trivial web ui.

Cargo.toml

@@ -21,6 +21,12 @@ regex = "1.7.0"
 lazy_static = "1.4.0"
 tempfile = "3.3.0"
 fraction = "0.13.0"
+actix-web = "4.3.0"
+tokio = { version = "1.24.2", features = ["full"] }
+minijinja = { version = "0.30.2", features = ["source"] }
+actix-utils = "3.0.1"
+actix-web-lab = "0.18.9"
+minijinja-autoreload = "0.30.2"
 
 [dependencies.apache-avro]
 version = "0.14.0"