New syntax req: tcsh / sh (c-shell)

[edrozenberg]

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Syntax:
C-Shell (tcsh / csh), extension .csh

Guideline Criteria:
https://packagecontrol.io/packages/Tcsh%20and%20Csh%20Mode

I tried adding it locally with
git clone https://github.com/supergra/tcsh-sublime.git

in ~/.config/bat/syntaxes

but doesn't seem to work, I assume due to it using TextMate-type files (.tm____).

For now I modified ~/.config/bat/config with:
--map-syntax='*.csh:Bourne Again Shell (bash)'