Add doc for kill couchase service command in cbdinocluster

Author: CosmicSaaurabh

docs/CHAOS_KILL.md

@@ -0,0 +1,38 @@
+## Chaos kill-couchbase command
+
+Cbdinocluster provides a way to kill couchbase service running 
+on a docker container by using `chaos kill-couchbase` command.
+This method is used to simulate a stop and restart of the couchbase server.
+
+### What it does
+
+If no nodeId is provided, the command will terminate the Couchbase service on all nodes in the cluster.
+If a nodeId is specified, only the Couchbase service on the specified node will be terminated.
+The command should first gather information about the nodes, including the containers on which they are running,
+And it should then simply exec into a Docker container and run `pkill -f couchbase-server` 
+to terminate the Couchbase service.
+
+The `runSv` supervisor will automatically restart couchbase-server within a few seconds.
+
+### Usage
+
+This command is useful in case where a Couchbase server may be unexpectedly stopped and restarted.
+It allows observing behavior during the transition period when the server is restarting, 
+which can reveal issues with connection handling, retries, and error recovery.
+
+```
+
+### Kill Couchbase Service
+
+```
+cbdinocluster chaos kill-couchbase <clusterId> [nodeId]
+```
+
+### Supported Deployers
+
+| Deployer | Supported | Notes                   |
+|----------|-----------|-------------------------|
+| DOCKER   | Yes       | Supported for Docker    |
+| LOCAL    | No        | Not supported for local |
+| CAO      | No        | Not supported for cao   |
+| CLOUD    | No        | Not supported for cloud |