[REQ] update docs with tutorials

[pmengelbert]

What kind of request is this?

Improvement of existing experience

What is your request or suggestion?

The existing docs are thorough and clear. But through experience I have found that many people I've directed to the docs have copied and pasted the examples without reading the text, preferring to play around with dalec rather than read the docs. We should create a set of tutorial docs that play into this tendency, with the following constraints:

• It is a series of examples, with minimal textual explanation
• The examples all compile properly without modification
• The examples are graded from extremely simple to multiple sources with complex build steps and generators.

Are you willing to submit PRs to contribute to this feature request?

• Yes, I am willing to implement it.