fix(keymaps): no diagnostic keymaps w/o lsp attached (#1698)

lua/lazyvim/config/keymaps.lua

@@ -98,6 +98,22 @@ map({ "n", "v" }, "<leader>cf", function()
   Util.format({ force = true })
 end, { desc = "Format" })
 
+-- diagnostic
+local diagnostic_goto = function(next, severity)
+  local go = next and vim.diagnostic.goto_next or vim.diagnostic.goto_prev
+  severity = severity and vim.diagnostic.severity[severity] or nil
+  return function()
+    go({ severity = severity })
+  end
+end
+map("n", "<leader>cd", vim.diagnostic.open_float, { desc = "Line Diagnostics" })
+map("n", "]d", diagnostic_goto(true), { desc = "Next Diagnostic" })
+map("n", "[d", diagnostic_goto(false), { desc = "Prev Diagnostic" })
+map("n", "]e", diagnostic_goto(true, "ERROR"), { desc = "Next Error" })
+map("n", "[e", diagnostic_goto(false, "ERROR"), { desc = "Prev Error" })
+map("n", "]w", diagnostic_goto(true, "WARN"), { desc = "Next Warning" })
+map("n", "[w", diagnostic_goto(false, "WARN"), { desc = "Prev Warning" })
+
 -- stylua: ignore start
 
 -- toggle options