Add backward-compatible wordBreak option that follows css word-break rules

[mkhatib]

Not sure if this will go in, the project doesn't seem to be active. But sending this anyway in case others ran into the same problem with clipping words as I did.

Also for those who wants to use this functionality I've published my own npm package. You can

npm i @mkhatib/layout-bmfont-text
# And if you use this through three-bmfont-text I've also published a version of that that uses this change.
npm i @mkhatib/three-bmfont-text

What kind of change does this PR introduce? (check at least one)

• Bugfix (non-breaking change which fixes an issue)
• Feature (non-breaking change which adds functionality)
• Code style update
• Refactor (refactoring or adding test which isn't a fix or add a feature)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes
• No

Did you test your solution?

• I lightly tested it in one browser
• Also tested it within a project I was already using the package in with no problems
• I deeply tested it in several browsers
• I wrote tests around it (unit tests, integration tests, E2E tests)

Problem Description

The library defaulted to break-all behavior when it ran out of space on the line. So A paragraph like this:

Hello World today is going to be beautiful

Would break into:

Hello W
orld tod
ay is goi
ng to be
beautiful

Solution Description

I've added an option users can pass (that defaults to the old break-all behavior so not to break others. But now you can this can render like:

Would break into this with normal:

Hello 
World
today
is
going
to be
beautiful

Would break into this with break-word (only breaks the word if it can't fit on a line by itself):

Hello 
World
today
is
going
to be
beaut
iful

Side Effects, Risks, Impact

• N/A

Aditional comments: