Slow Cooker Garlic Butter Pork Chops

Ingredients
3–4 bone-in pork chops
1 medium onion, finely chopped
4 cloves garlic, minced
2 tablespoons butter
1 cup chicken broth
1 teaspoon paprika
1 teaspoon dried thyme
1 teaspoon black pepper
1/2 teaspoon salt, or to taste
1 tablespoon olive oil