[cli] Standalone rtw ws create (#219)

* [cli] backup standalone

* [cli] first version of ws import from standalone image, but needs fix when sourcing empty ws folder

* [cli] refactor to allow standalone workspaces

* [cli] show error for existing ws first

* [cli] change python to python3 in setup.bash

rtwcli/rtw_cmds/rtw_cmds/docker/verbs.py

@@ -15,6 +15,7 @@
 from rtwcli.docker_utils import (
     docker_exec_interactive_bash,
     docker_start,
+    fix_missing_xauth_file,
     is_docker_container_running,
 )
 from rtwcli.verb import VerbExtension
@@ -38,6 +39,10 @@ def main(self, *, args):
             print(
                 f"The docker container '{ws.docker_container_name}' is not running, starting it now."
             )
+            # fix missing .xauth file if it is not present
+            if not fix_missing_xauth_file(ws.docker_container_name):
+                print(f"Failed to fix missing .xauth file for '{ws.docker_container_name}'.")
+                return
 
             if not docker_start(ws.docker_container_name):
                 print(f"Failed to start docker container '{ws.docker_container_name}'.")