Add haskell-language-server as lsp for cabal files (#9111)

book/src/generated/lang-support.md

@@ -11,7 +11,7 @@
 | blueprint | ✓ |  |  | `blueprint-compiler` |
 | c | ✓ | ✓ | ✓ | `clangd` |
 | c-sharp | ✓ | ✓ |  | `OmniSharp` |
-| cabal |  |  |  |  |
+| cabal |  |  |  | `haskell-language-server-wrapper` |
 | cairo | ✓ | ✓ | ✓ | `cairo-language-server` |
 | capnp | ✓ |  | ✓ |  |
 | clojure | ✓ |  |  | `clojure-lsp` |

languages.toml

@@ -2698,6 +2698,7 @@ file-types = [ "cabal" ]
 roots = ["cabal.project", "Setup.hs"]
 indent = { tab-width = 2, unit = "  " }
 comment-token = "--"
+language-servers = [ "haskell-language-server" ]
 
 [[language]]
 name = "hurl"