feat: add ellipsis and maxLines state explicitly to Speaker text

[s-kamada]

Issue

• close #894

Overview (Required)

• The number of rows of the Speaker name in the GridItem of the timetable was different from that in the figma, so it was clarified so that ellipsis is always done in one line.

Links

Screenshot (Optional if screenshot test is present or unrelated to UI)

Before	After	figma

Movie (Optional)

Before	After

[github-actions[bot]]

Snapshot diff report	File name	Image
TimetableItemDetailC ontentWithEnglishPre view_compare.png
TimetableItemDetailC ontentPreview_compar e.png
TimetableItemDetailC ontentWithMixedPrevi ew_compare.png
ShareableCardPreview _compare.png