feat(db): <leader>b opens DBUI in new tab

lua/409/plugins/db.lua

@@ -13,6 +13,13 @@ return {
 			"DBUIAddConnection",
 			"DBUIFindBuffer",
 		},
+        keys = {
+            {
+                "<leader>b",
+                ":tab DBUI<CR>",
+                desc = "Database explorer"
+            }
+        },
 		init = function()
 			-- Your DBUI configuration
 			vim.g.db_ui_use_nerd_fonts = 1