feat(nvim): add toggle for relativenumber

.config/nvim/lua/core/mappings.lua

@@ -52,6 +52,13 @@ M.setup = function()
             end
         end,
     })
+
+    -- Toggle relativenumber
+    map('n', '<leader>sn', '', {
+        callback = function()
+            vim.opt.relativenumber = not vim.opt.relativenumber:get()
+        end,
+    })
 end
 
 return M