Add example for text2image

[XinyuYe-Intel]

Description

Add example for text2image.

Issues

n/a.

Type of change

List the type of change like below. Please delete options that are not relevant.

• [x] New feature (non-breaking change which adds new functionality)

Dependencies

List the newly introduced 3rd party dependency if exists.

Tests

Describe the tests that you ran to verify your changes.