fix(ci): change Docker Hub namespace from pezkuwichain/ to pezkuwi/

Docker Hub personal account namespace must match the username.
Updated all docker.io image references across workflows, actions,
docker-compose files, and zombienet configs.

.github/workflows/cmd.yml

@@ -240,7 +240,7 @@ jobs:
       - id: set-image
         run: |
           BODY=$(echo "$CMD" | xargs) # remove whitespace
-          IMAGE_OVERRIDE=$(echo $BODY | grep -oe 'docker.io/pezkuwichain/ci-unified:.*\s' | xargs)
+          IMAGE_OVERRIDE=$(echo $BODY | grep -oe 'docker.io/pezkuwi/ci-unified:.*\s' | xargs)
 
           cat .github/env >> $GITHUB_OUTPUT