IDEAS.md

Development ideas

• Add a Table rsx component.
• Add a derive(Sortable) on T struct.
• Consider making SortBy an opaque trait covered by SortBy::* builders.
• Consider a default impl of Sortable that returns increasing_or_decreasing.
• Consider minimising Sortable in the docs and offering it as a way to customise further.
• Add a gif to README.md