Currently, the QtQuick TextInput has no accessibility implementation, which means that it is e.g. completely inaccessible to screen readers.

Steps to reproduce:

1. build and run the given sample program:

   import QtQuick
   import QtQuick.Controls
   import QtQuick.LayoutsWindow {
       width: 640
       height: 480
       visible: true
       title: qsTr("Editable Text Sample")   ColumnLayout {
          TextEdit {
              text: "This is a TextEdit"
          }
          TextInput {
              text: "This is a TextInput."
          }
          TextField {
              text: "This is a TextField."
          }
      }}
    

1. run Accerciser and inspect the applications accessibility tree

Actual result
The "Editable Text Sample" frame only has 2 children: one for the TextEdit, and one for the TextField, but none for the TextInput.

Expected result:
The TextInput should also be available on the a11y layer, so that assistive technology can interact with it.