[FEATURE] Scots Trait & Speech

[Cirrial]

Description
Bring the speech of the mighty glens to space! Och aye! This patch adds a Scots (more accurately, Scotched English/barely comprehensible gobbledygook) filter to text, substituting many English words with Scots counterparts. It also adds a free language trait to pick in order to be granted this strange new language, not quite English, not quite Scots, but something a wee bit atween!

Admin/coder notes: This includes a bioeffect ("accent_scots") and is enabled as a discoverable mutation much like other speech filters.

Integration Notes/Warnings

• All the various disconnected bits and pieces of speech filter bothered me so much I ended up gathering them in accents.dm, so that might be a bit of a breaking change.
  
• I've probably missed a few bits there too so CONSISTENCY
  
• Modifies traits and mutations, so if there's any format to either of those those parts will need to be updated. In particular I am reasonably sure in the modern codebase accent-based traits add their accents in a way that mutadone doesn't remove them, but I could be wrong?
  
• The scots word filter stuff is defined in strings/language/scots.txt, so feel free to modify the list!
  

Code

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