How to display additional content on the category page?

Question

OctoberCMS

Rainlab's blog is installed in October cms. The blog works normally. It has several categories. If you go to the category 1 page, then it will display posts related to this category 1.
In the admin panel for a category, you can fill in only 2 fields (name and description).
The title I use for title (meta)
The description I use for description (meta)
It works like this:

<?php
function onEnd()
    {
        if ($this->category)
            $this->page->title = $this->category-> name;
            $this->page->description = $this->category-> description;
    }
?>

I want to be able to display some custom text in addition to the title and description. Roughly speaking, I am missing one field in the category admin, which I could fill in and display in the place I need on the category page.
To put it more simply, I need to add a description for each category, but I only have one template page for displaying categories, which displays posts through :slug.
Can you please tell me how this can be implemented?

Answer 1

You need to use the plugin extension: https://octobercms.com/docs/plugin/extending