fix: pass empty table if it does not exist

lua/catppuccino/core/mapper.lua

@@ -189,7 +189,7 @@ local function get_integrations()
 		end
 	end
 
-	final_integrations = vim.tbl_deep_extend("force", final_integrations, require("catppuccino.core.remaps").get_hig_remaps())
+	final_integrations = vim.tbl_deep_extend("force", final_integrations, require("catppuccino.core.remaps").get_hig_remaps() or {})
 	return final_integrations
 end