Add example using seed param to get consistent outputs

[mrkiura]

Updates the examples directory with an example that demonstrates how to reprodduce similar outputs.

[mrkiura]

I appreciate you taking a look.

[mxyng]

Setting seed alone won't achieve reproducible outputs.

The fill-in-middle example sets temperature=0 which is sufficient for generating reproducible outputs.

[mrkiura]

You are right. The temperature here should be zero. I observed little variance between a value of 0 and 0.1.