feat: add CLI shell and exec commands for pod terminal access

centml/cli/main.py

@@ -2,6 +2,7 @@
 
 from centml.cli.login import login, logout
 from centml.cli.cluster import ls, get, delete, pause, resume
+from centml.cli.shell import shell, exec_cmd
 
 
 @click.group()
@@ -47,6 +48,8 @@ def ccluster():
 ccluster.add_command(delete)
 ccluster.add_command(pause)
 ccluster.add_command(resume)
+ccluster.add_command(shell)
+ccluster.add_command(exec_cmd, name="exec")
 
 
 cli.add_command(ccluster, name="cluster")