Basic support for Literate Haskell

Author: LaurentRDC

languages.toml

@@ -1591,6 +1591,18 @@ indent = { tab-width = 2, unit = "  " }
 name = "haskell-persistent"
 source = { git = "https://github.com/MercuryTechnologies/tree-sitter-haskell-persistent", rev = "58a6ccfd56d9f1de8fb9f77e6c42151f8f0d0f3d" }
 
+[[language]]
+name = "haskell-literate"
+scope = "source.haskell-literate"
+injection-regex = "lhs"
+file-types = ["lhs"]
+roots = ["Setup.hs", "stack.yaml", "cabal.project", "hie.yaml"]
+shebangs = ["runhaskell", "stack"]
+comment-token = "--"
+block-comment-tokens = { start = "{-", end = "-}" }
+language-servers = [ "haskell-language-server" ]
+indent = { tab-width = 2, unit = "  " }
+
 [[language]]
 name = "purescript"
 scope = "source.purescript"