bug#52289: Update Info documentation of Eshell's built-in commands

[ej32u]

Hello,

This patch adds the remaining Eshell built-ins to the Eshell Info
documentation.  It also expands on some of the existing commands and
mentions user options that affect a command's behavior.

To be clear, I am not very familiar with some of the commands (Eshell or
GNU/Bash) or their settings and behavior, which is why I think more
information would be helpful.

Thank you.

v1-0001-Update-the-Info-documentation-of-Eshell-s-built-i.patch
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