Add support for RemoteCommand option in kitten ssh

shell-integration/ssh/bootstrap.py

@@ -321,6 +321,11 @@ def main():
         os.environ.pop('KITTY_SHELL_INTEGRATION', None)
         cmd = base64.standard_b64decode(exec_cmd).decode('utf-8')
         exec_with_better_error(login_shell, os.path.basename(login_shell), '-c', cmd)
+    remote_cmd = b'REMOTE_CMD'
+    if remote_cmd:
+        os.environ.pop('KITTY_SHELL_INTEGRATION', None)
+        cmd = base64.standard_b64decode(remote_cmd).decode('utf-8')
+        exec_with_better_error(login_shell, os.path.basename(login_shell), '-c', cmd)
     TEST_SCRIPT  # noqa
     if ksi and 'no-rc' not in ksi:
         exec_with_shell_integration()

shell-integration/ssh/bootstrap.sh

@@ -158,6 +158,8 @@ prepare_for_exec
 # If a command was passed to SSH execute it here
 EXEC_CMD
 
+REMOTE_CMD
+
 # Used in the tests
 TEST_SCRIPT