Add new production from keyword to list of keywords

Bind productions in all following calls.
Should probably use `(let [step (step-with-productions productions)] ...)` instead.

Takes multiple keywords and combines them into one, e.g. (combine-keywords :a :b) -> :ab

Get keyword name without the colon

The productions are written as a hash map

Return the nth step using the productions and initial state

Convert list of keywords, numbers, strings to a single string

Return next iteration of state using the given productions

Bind step function to given productions

Takes string of characters and turns them into keywords