Refactor number parsing

[cannawen]

Create a module with a function that takes in a string (with numbers), and return an object that contains an array of

• the start index of the number found
• the end index of the number found
• the "float" or "int" value of the number found, without formatting.

For example, input: "10,001 miles -4.56 foobar" Should return output:

[
  { startIndex: 0, endIndex: 5, number: 10001 },
  { startIndex: 13, endIndex: 17, number: -4.56 }
]

Number types supported, to start:

• Negative numbers
• Numbers with commas in groups of 3
• Numbers without commas
• Numbers with decimal places

We should try to make each of the different types of numbers defined in their own file, so it is easy to add future kinds of numbers.

This "number standardizing" step can happen after the preprocessing step, but before the conversion step to simplify our conversion number regexes.

We can ignore conversions like "5 foot 2 inches" for now, and put that back in a separate issue (changing when the "preproccess" for each individual conversion is done)

[cannawen]

Closing for inactivity - Perhaps a future enhancement to look into