Add DLC Icons to distinguish content

[dotSp0T]

Part of #14

In order to distinguish where chains and content are from, we should add DLC Names and/or Icons.

Required:

• create sections with coloured borders and a legend, around DLC content that can be sectioned off (e.g. around the Jornalero and Obrero consumables sections). Similar in the base style of html fieldset + legend tags ( https://www.w3schools.com/html/html_form_elements.asp )
• create coloured borders around recipes that have been added by dlc, but are organized in generic sections (e.g. the Aluminium chain in Building Materials).
• add DLC icons and lightly coloured background to parts of chains, that come from different DLC (e.g. the New World Cattle Farm in the Artisan's Goulash chain)
• create legend page (or section if we already have a legend/glossary page) that gives an overview for DLC icons and colours

Additional Ideas:

• create links from chain-elements that come from a DLC to the DLC main page? or alternatively to the legend page. The link should be placed on the DLC icon, as the main icon links to the wiki
• use shaded background not only for single parts of chains, but also for whole chains and dlc related areas/pages. Will have to check with pdf generation and printing about readability and colour-consumption on printers...

[kruzuahz]

I like the ideas, I'm not sure if you could find 13 different colors for all dlc which are distinct and clear enough (the game also does not use color coding). So i suppose icons are the way to go here.

If we do go with colors we can use the same latex modes here to make a colourless printer-friendly variant.

for anyone interested here is the package documentation that is used.

[dotSp0T]

https://graphicdesign.stackexchange.com/questions/108733/how-to-get-10-different-colors-that-are-easily-recognizable