eshell-info-banner

`eshell-info-banner' is a utility for creating an informative
banner akin to fish_greeting if fish shell but for Eshell.  It can
provide information on:
- the OS’ name
- the OS’ kernel
- the hostname
- the uptime
- the system’s memory usage (RAM, swap, disk)
- the battery status
It can be TRAMP-aware or not, depending on the user’s preferences.