Option to separate code from docs/config data

[eugenesvk]

Currently there is just a single file for a mod that contains 3 separate documents:

• code for the mod
• markdown description
• yaml config

Now, this is all fine and good for a simple copy&paste, and there is even an internal extension that highlights those parts separately, but for actual development - why would you use unfamiliar embedded dev environment with all the different keybinds/extensions/themes when you already have everything setup elsewhere?
And for that it would be preferable to have just 3 separate files that don't interfere with each other

So as an alternative Windhawk could maybe also accept something like:

• mod.wh.cpp
• mod.wh.md
• mod.wh.yaml
• mod-frontmatter.wh.??? (or maybe this could be part of the cpp)

if those extra files exist (or maybe the frontmatter file/part could allow referenceing to such files directly?)