Flutter Web: Single-line text <input> elements require all options for the type (not just type="text") (Accessibility)

### Use case

The following data types are available for single-line text `<input>` elements:
- `email`
- `password`
- `search`
- `tel`
- `text` (default value)
- `url`

### Proposal

The following values for the `<input>` type attribute must be available for single-line text components/widgets:

- `email`
- `password`
- `search`
- `tel`
- `url`