Start work on kitty launcher for remote servers

This will automatically download kitty and run it. The ssh kitten
can add it to PATH thereby making kitty available on the remote machine
at low cost.

kittens/ssh/main.py

@@ -30,7 +30,7 @@ from typing import (
 
 from kitty.constants import (
     cache_dir, runtime_dir, shell_integration_dir, ssh_control_master_template,
-    terminfo_dir
+    str_version, terminfo_dir
 )
 from kitty.options.types import Options
 from kitty.shm import SharedMemory
@@ -171,6 +171,9 @@ def make_tarfile(ssh_opts: SSHOptions, base_env: Dict[str, str], compression: st
                 f'{arcname}/ssh/*',          # bootstrap files are sent as command line args
                 f'{arcname}/zsh/kitty.zsh',  # present for legacy compat not needed by ssh kitten
             ))
+        arcname = 'home/' + rd + '/kitty'
+        add_data_as_file(tf, arcname + '/version', str_version.encode('ascii'))
+        tf.add(shell_integration_dir + '/ssh/kitty', arcname=arcname + '/bin/kitty', filter=normalize_tarinfo)
         tf.add(f'{terminfo_dir}/kitty.terminfo', arcname='home/.terminfo/kitty.terminfo', filter=normalize_tarinfo)
         tf.add(glob.glob(f'{terminfo_dir}/*/xterm-kitty')[0], arcname='home/.terminfo/x/xterm-kitty', filter=normalize_tarinfo)
     return buf.getvalue()