Introduce the ability to construct custom parsers

[exoRift]

This is a complete reimagining of Wizard and introduces many breaking changes.

Main Changes

• parse, stringify, and summarize are no longer globally exported functions. Instead, import WizardParser, construct it, and call WizardParser.*().
• You can now define custom operators. Rather than using the predefined operator definitions, you have full control over the defined usable operators and how they're stringified via dialects.
• You can add custom stringification dialects

Notable (and possibly breaking) Changes

• The default implicit negation results in a converse of what it used to be. For example, !field will now result in field != true rather than field = false
• condenseBooleans in .stringify() options has been renamed to condenseImplicit
• Added dateSerializer config option for date stringification

Unchanged

• executeAsKnex remains unchanged, although it's recommended you roll your own execution function, as this function serves as more of an example