Truncate long lead sections at 30 lines.
Prototype: https://justinscherer.github.io/minerva-prototypes/closed%20sections%20links/index.html
[[ https://www.figma.com/design/ZRvECtGm0YI4W8P4YQwTpB/Minerva-truncation-for-casual-readers?node-id=65-611 | Figma design spec ]]
==Acceptance criteria
[] timebox a quick investigation about distribution of long sections
[] detect when a lead section exceeds 30 lines
[] truncate text
[] fade at point of truncation
[] add a `Read more` full-width button as per design. Disappears on tap
==Original ticket description
Treatments to test against control:
- long lead sections truncated at [30 lines]
- infoboxes collapsed as a Quick Facts section, similar to apps
- both
(Note: no subsection chips in this epic)
NOTE: //infoboxes collapsed as a Quick Facts section// will be done in {T432752}.