~jaro/balkon

ref: b36dcd9859e8d5209a08186555b8f799ad2c8b0f balkon/src/Data/Text d---------
Fix style: white space around operators.
Fix style: white space in exports and imports.
Fix style: bullet points in comments.
Fix style: non-ASCII characters in comments.
Mark some lists as explicitly non-empty.
Fix typos in comments.
Improve documentation for pagination.
Prepare pagination for future layout types.
Add paragraph pagination.
Implement splitting ParagraphLayout into lines.
Implement generic pagination internally.
Separate module for the ParagraphLayout type.
Remove collapsible spaces at beginning of lines.
Allow empty lines when hard line breaking.
Support hard line breaks.
Add internal functions for "shaped runs" output.
Document considerations for beginsText/endsText.
Properly use ICU locale identifiers.
Fix typo in comment.
Clarify spanLanguage and add basic ICU conversion.
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