More working examples in the documentation

[tarreislam]

It feels like the 1.x release assumes deep familiarity with 0.x and treats the documentation as a running changelog. I ran into this with the cart’s SetShippingOption, where the behavior wasn’t clear until I stepped through the source. For my tests, I ended up using a raw database insertion just to move forward, which shouldn’t be necessary.

Practical, copy-ready examples would make the onboarding process far smoother for anyone new to Lunar.