~jaro/balkon

ref: b03b0b9e48c60195976425cc5b666e1e6cd712ff balkon/src/Data/Text/ParagraphLayout/Internal d---------
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.
Remove (~) operator from ParagraphConstruction.

The tilde operator was causing compilation errors with older versions
of GHC, possibly due to a conflict with the lazy pattern match syntax.

It has been replaced by a pure Haskell alternative that uses function
application.
Refactor line breaking.
Allow breaking at character bounds.
Use a single list of line breaking alternatives.
Clarify meaning of Array in Paragraph.
Implement trimming spaces at end of lines.
Remove redundant overflow handling.

This may be useful later when words are allowed to overflow, but this
code path is currently unused.
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