added some kakoune stuff

modules/gui/kakoune/kak-lsp.toml

@@ -0,0 +1,18 @@
+[language.haskell]
+filetypes = ["haskell"]
+roots = ["Setup.hs", "stack.yaml", "*.cabal"]
+command = "haskell-language-server-wrapper"
+args = ["--lsp"]
+
+[language.rust]
+filetypes = ["rust"]
+roots = ["Cargo.toml"]
+command = "rust-analyzer"
+settings_section = "rust-analyzer"
+[language.rust.settings.rust-analyzer]
+"proMacro.enable" = true
+
+[language.nix]
+filetypes = ["nix"]
+roots = ["shell.nix", "default.nix", "home.nix", "flake.nix"]
+command = "rnix-lsp"