feat: add cuda support (#170)

Co-authored-by: horst5000 <thomas.bolemann@mercedes-benz.com>

Author: horst5000

lua/Comment/ft.lua

@@ -31,6 +31,7 @@ local L = {
     cpp = { M.cxx_l, M.cxx_b },
     cs = { M.cxx_l, M.cxx_b },
     css = { M.cxx_b, M.cxx_b },
+    cuda = { M.cxx_l, M.cxx_b },
     dhall = { M.dash, M.haskell_b },
     dot = { M.cxx_l, M.cxx_b },
     eelixir = { M.html, M.html },