Add support for hyphenation during creation of number words

[jo-elimu]

Is your feature request related to a problem? Please describe.
It is unnecessarily time-consuming for content creators having to create hyphenated words as one word, instead of just combining two existing words into one.

For example: We don't want content creators to add "twenty-one," "twenty-two," "twenty-three," etc, as individual words.

Describe the solution you'd like
Look for a solution which makes it possible to add a hypen ('-') symbol between words when adding number words.

Example:

1. Step 1: Add "twenty"
2. Step 2: Add hyphen
3. Step 3: Add "one"

Describe alternatives you've considered
One possible solution would be to add "-" as a Word so that content creators can pick it from the list of words when adding numbers words for a number. But we should add some additional metadata to it, if that's the solution we are going for.

Additional context

/content/number/create