Ensure tmuxinator switches or attaches on connect

[joshmedeski]

For raycast/extensions#20732 (comment)

• When running sesh from the terminal, tmuxinator commands will automatically switch to the session
• In the Raycast isolated environment, connecting to a tmuxinator session throws an exit code.

Now, the tmux SwitchOrAttach command is always called when connecting to a tmuxinator command, this fixes the issue inside Raycast.