Allow alignment of table columns or cells

[utopiabound]

Problem

Right aligning data in Table Cells

Solution(s)

• Offer fn align() on Text (possibly moving aligment logic from Paragraph to Text)
• Add alignment logic to Cell.

Alternatives

Adding alignment data to Lines in a Cell does nothing.

Additional context

This is a "port" of the Feature Request from fdehau/tui-rs#295