feat(lsp): add mapping for toggling diagnostics

lua/lsp/keymap.lua

@@ -38,6 +38,13 @@ function M:init(server, bufnr)
         { mode = { "n" }, lhs = "<leader>lr", rhs = vim.lsp.buf.rename },
         { mode = { "n" }, lhs = "<leader>la", rhs = vim.lsp.buf.code_action },
         { mode = { "n", "x" }, lhs = "<leader>lf", rhs = vim.lsp.buf.format },
+        {
+            mode = { "n" },
+            lhs = "<leader>ld",
+            rhs = function()
+                vim.diagnostic.enable(not vim.diagnostic.is_enabled())
+            end,
+        },
         {
             mode = { "n", "i" },
             lhs = "<C-l>",