Proposal: List should have a method to return its items

[nervo]

Still taking a look at the new list component :)

This time, i realize that there are no methods to return list items :(

Looking also at the tree component, i see that:

• it has a Child method, to add children
  

  lipgloss/tree/tree.go

  Line 133 in 33b3263

  func (t *Tree) Child(children ...any) *Tree {

• it has a Children method to return children
  

  lipgloss/tree/tree.go

  Line 290 in 33b3263

  func (t *Tree) Children() Children {

On the list side:

• a Item method to add item
  

  lipgloss/list/list.go

  Line 184 in 33b3263

  func (l *List) Item(item any) *List {

• a Items method to add items
  

  lipgloss/list/list.go

  Line 198 in 33b3263

  func (l *List) Items(items ...any) *List {

I think both Item and Items methods could be combined into a single Item method (just like Child in tree does) and Items should simply returns list items (just like Children in tree does).

If you're ok with that, i can make a pull request.