Add word/line break option <wbr />

[hanneslsm]

What problem does this address?

Some words are too long, so they will break on mobile (even with fluid typography). Unfortunately, the word break can be incorrect.
With the wbr Tag it's possible to control where the word will break. With ­ a hyphen will be added.

Desktop (no issues)	Mobile (Wrong word/line break)
	The correct word break in this word would be "Verpackungs- lösungen"

What is your proposed solution?

Adding a option for line break or word break
Not sure if "(invisible)" is the best wording.

This is very important for making Gutenberg more attractive to non-english speaker.

[masteradhoc]

+1 from me. We get through this also a lot and would appreciate a solution :)

[hanneslsm]

For everyone reading this how to break words manually until this feature exist:

1. Go to the Code editor and search for the word
2. Add either ­ (word break with hyphen) or <wbr /> (without)