Layout parser image and table annotations is in General Availability (GA)

## Feature Feature [Layout parser](https://cloud.google.com/document-ai/docs/layout-parse-chunk) image and table annotations is in [General Availability (GA)](https://cloud.google.com/products/#product-launch-stages). Layout parser can identify if there are images or tables in parsed documents. When found, images and tables are annotated as a descriptive block of text with the information depicted in the image and table.