project: start up with project.nvim

config/lsp/nvim-metals.nix

@@ -30,6 +30,7 @@
             metalsBinaryPath = "${pkgs.lib.getExe pkgs.metals}",
             useGlobalExecutable = true
           }
+          vim.lsp.inlay_hint.enable(true)
           require("metals").initialize_or_attach(metals_config)
         end
       '';