bug#68963: 30.0.50; [PATCH] Split Eshell built-in command documentation into subsections

[Eli Zaretskii]

> Date: Tue, 6 Feb 2024 16:02:32 -0800
> From: Jim Porter <jporterbugs@gmail.com>
> 
> Currently, the Eshell manual lists all the built-in commands in one 
> section, which can make it hard to find the commands related to the 
> topic you care about. Here's a patch to split this into subsections of 
> various (loosely-defined) topics.

If people look for commands by using 'i' (Info-index), then finding
them in a single long section will be as easy as doing that in several
shorter ones.