Add guide explaining how type inference works in Woodwork

[thehomebrewnerd]

Woodwork's current documentation includes a guide providing an overview of types and tags as well as a guide for how to customize the type system and type inference. To complement these guides, a new guide that explains how type inference works would be beneficial.

Topics that could be covered:

• How does Woodwork identify the logical type for a column?
• What types can be inferred by default? What types must be specified?
• What significance to relationships have between logical types?
• What happens if no inference matches are found?
• What happens if multiple inference matches are found?

[gsheni]

We should make this section easy to read for first time users. A short and concise section that allows users to see how we do inference.

[gsheni]

Putting this in the backlog to address at another time, as we might revisit our inference (per https://github.com/alteryx/woodwork/issues/1133)