docs: add section about cmserve to the readme

Author: PlexSheep

README.md

@@ -188,6 +188,16 @@ quit
 exit
 ```
 
+## JSON Interface
+
+From `v0.2.0`, Coreminer includes a second binary: `cmserve`. `cmserve` provides
+all internal functionalities of the Coreminer debugger, but can be
+scripted. This enables projects such as [hardhat](https://github.com/debugger-bd/hardhat)
+to build a better user interface for Coreminer.
+
+To see some example inputs (statuses) and outputs (feedbacks), you can use
+`cmserve --example-statuses --example-feedbacks `.
+
 ## Use Cases
 
 - **Reverse Engineering**: Analyze and understand program behavior