doc: Add kube diff demo (#99)

Author: Ramilito

README.md

@@ -26,6 +26,10 @@ Processes kubectl outputs to enable vim-like navigation in a buffer for your clu
   <summary>Tail logs</summary>
   <img src="https://github.com/Ramilito/kubectl.nvim/assets/17252601/8ab220a7-459a-4faf-8709-7f106a36a53b" width="700px">
 </details>
+<details>
+  <summary>Compare diff</summary>
+  <img src="https://github.com/user-attachments/assets/52662db4-698b-4059-a5a2-2c9ddfe8d146" width="700px">
+</details>
 
 
 ## ⚡️ Required Dependencies