page XML: use break="no" attribute on lb and pb in case of syllable division

[lueck]

When there is hyphenation of a word on an <lb/> or <pb>, add the break="no" attribute to the element to indicate that the tokens should be joined together.

See:

• TEI reference: https://www.tei-c.org/release/doc/tei-p5-doc/en/html/ref-att.breaking.html
• TEI guidelines 3.11.3: https://www.tei-c.org/release/doc/tei-p5-doc/en/html/CO.html#CORS5
• TEI guidelines 3.2.2: https://www.tei-c.org/release/doc/tei-p5-doc/en/html/CO.html#COPU-2

Tasks:

• condition a: when there is a hyphen at the end of the line
• then output <lb break="no"/> or <pb break="no"/>
• make this optional
• if condition a and option activated
  • condition b: the next line starts with a small letter
  • either replacement of the hyphen by string from stylesheet parameter, which defaults to the empty string (removal)
  • or by <pc force="weak">-</pc>
• mark the state of the element(s) as approval required by means of, e.g., @change or @cert

[lueck]

added 2h of time spent

[lueck]

mentioned in commit 8b341c7