Point to examples more prominently in the docs

[Martinsos]

I notice people often ask about more Wasp examples hm. We do have them and there is a link to them at our landing page https://github.com/wasp-lang/wasp/tree/release/examples, but it seems people don't see them. Probably they jump into docs, and it seems then they are not prominent enough in the docs!
We should make them more prominent in our docs. I suggest adding a link to examples in the docs at the end of the Tutorial, and to also have a special section just for them, so it appears on the left in the sidebar, probably pretty high, under "Getting Started" or "Tutorial".