docs: add Usage section to the README.md

Signed-off-by: Shane Utt <[email protected]>

Author: shaneutt

README.md

@@ -29,6 +29,18 @@ This project provides bindings in [Rust] for [Kubernetes] [Gateway API].
 [Gateway API Introduction]:https://gateway-api.sigs.k8s.io/#introduction
 [Rust]:https://rust-lang.org
 
+## Usage
+
+Basic usage involves generating a [kube-rs] to perform create, read, update and
+delete (CRUD) operations on [Gateway API resources]. You can either use a basic
+[Client] to perform CRUD operations, or you can build a [Controller]. See the
+`gateway-api/examples/` directory for detailed (and specific) usage examples.
+
+[kube-rs]:https://github.com/kube-rs/kube
+[Gateway API resources]:https://gateway-api.sigs.k8s.io/api-types/gateway/
+[Client]:https://docs.rs/kube/latest/kube/struct.Client.html
+[Controller]:https://kube.rs/controllers/intro/
+
 ## Development
 
 This project uses [Kopium] to automatically generate API bindings from upstream