Attempting such a retrofit would be extremely complex, dangerous, and likely illegal. It would be almost certainly impossible to meet modern safety standards and ensure proper deployment in an accident. You risk serious injury or even death.
Instead of trying to add airbags, focus on other safety measures, such as ensuring your seatbelts are in good condition, and driving defensively. The 1995 Jeep Wrangler, like many vehicles of its era, relied on seatbelts and a robust roll cage for occupant protection.