[horde] The Road To H6: horde/components tool is now on packagist

[Lang, Ralf]

Hello,

I have now added the necessary dependencies to install the 
horde/components tool via composer. This is a tool developers use to 
build the changelog, create releases and some other project 
administrative stuff.

I will probably have to rework the default config and code which sets up 
the github CI workflows. It was built with downstream in mind and didn't 
get a lot of testing on php8.1+.