Split the combined directions engines translations into routers and modes

[hlfan]

Problem

Only 46 of the 78 YAML files with engine translations have all nine engines translated. Thus, terms will be mixed-matched for 32 languages.
Take Afrikaans, where this messes up the sorting as well:

This also makes the translations more prone to errors and inconsistencies:

Description

Split up the nine combined translations into seven separate translations,

• three for the modes,
• three for the routers (usually don't need to be set) and
• one template (only needs to be overwritten in rtl languages, defaults to "%{modes} (%{routers})").

While most translations could be automatically transferred, I don't know how this could be done with translate-wiki.

Screenshots

No response