feat: Added add to cart/wishlist events functionality

[jansentjeu]

Added add to cart event functionality.

Testscenario 1:

1. Add a product to your cart in the Luma theme
2. Check if add to cart event is sent to Tweakwise with the correct data

Testscenario 2:

1. Add a product to your cart in the Hyva theme
2. Check if add to cart event is sent to Tweakwise with the correct data

Testscenario 3:

1. Add a product to your wishlist in the Luma theme
2. Check if add to wishlist event is sent to Tweakwise with the correct data

Testscenario 4:

1. Add a product to your wishlist in the Hyva theme
2. Check if add to wishlist event is sent to Tweakwise with the correct data