nvim: Add mapping to show notification history

Added the `<leader>sh` (show history) mapping to display the recent
history of messages sent to notify. Uses fidget.nvim to accomplish this.

nvim/.config/nvim/lua/plugins/ui.lua

@@ -58,6 +58,10 @@ return {
 			},
 		},
 		event = { "VeryLazy" },
+		cmd = {"Fidget"},
+		keys = {
+			{ "<leader>sh", "<cmd>Fidget history<cr>", { silent = true, desc = "show notification history" } },
+		}
 	},
 	-- make all vim.ui interfaces prettyy
 	{ "stevearc/dressing.nvim", config = true, event = "VeryLazy" },