Add Last Command

[joshmedeski]

Adds sesh last which will connect to the last tmux session.

• Grabs the second session sorted by last attached date
• Note: there is a slight delay from when the button can be pressed (like ~400ms)

Can be rebound with the following tmux.conf:

bind -N "⌘+l last-session (via sesh) " L run-shell "sesh-dev last"

⚠️ Warning: This is will overwrite the default <prefix>+L command (that works similarly)