fix(table): Selected row styling not applying to cells.

[MuhamedUsman]

Selected row styling not applying to individual cells.

• Fixes #729
• Now applies selected row styling to the individual cells.
• Individual cells now inherit necessary selected row styles.

s := table.DefaultStyles()
	s.Header = s.Header.
		BorderStyle(lipgloss.NormalBorder()).
		BorderForeground(lipgloss.Color("240")).
		BorderBottom(true).
		Bold(false)
	s.Selected = s.Selected.
		Foreground(lipgloss.Color("229")).
		Background(lipgloss.Color("57")).
		Bold(true).
		Italic(true).
		Underline(true)
	s.Cell = s.Cell.
		Foreground(lipgloss.Color("57"))
	t.SetStyles(s)

Before: After:

You can experiment further...