Add QuakeC

[cxong]

Language name

QuakeC

URL of example repository

https://github.com/eukara/freecs

URL of syntax highlighting grammar

https://github.com/drzel/quakec.vim/blob/master/syntax/quakec.vim

Most popular extensions

.qc

Detected language

not detected

[JosiahJack]

Another example repository: https://github.com/JosiahJack/Keep

VSCode highlighting:
https://github.com/joshuaskelly/vscode-quakec

[HeadClot]

Yet another few example repos:

https://github.com/itslunaranyo/copper
https://github.com/shpuld/id1-quakec-cleaned
https://github.com/fabiolimamp/alkaline
https://github.com/id-Software/quake-rerelease-qc

[johnmays]

The grammar posted by @JosiahJack will not work for now because it does not have a license, and thus cannot be included in linguist. If another syntax exists (as far as I know, there is no way to make a vim syntax work), or if the vscode quakec repo adds a license, then quakec can be added.