add_help_chapter Add an entry in the help list

## Syntax

    ok = add_help_chapter(title,path[,mode])

## Arguments

title

  String array, Help chapter title

path

  String array, Help chapters path

mode

  A boolean, if TRUE, the chapter is considered as belongs to a internal modules, otherwise, the chapter is added as external module. It is an optional input argument and its default value is %F.

ok

  A vector of booleans. The same size as the `path` variable. If the chapter page number i was not existing in the help system then ok(i) is set to %t.

## Description

This function adds a new entry in the help list. If the path is already present in the help list, `add_help_chapter` skips the add. The function checks if the directory exist.

## See also

- help
- del_help_chapter