feat(NLD-594): Convert decorative an non-decorative images

See merge request toegang-voor-iedereen/backend/lib/nldoc_conversion_writer_html!13

# [1.2.0](toegang-voor-iedereen/backend/lib/nldoc_conversion_writer_html@1.1.0...1.2.0) (2025-02-25)

### Features

* **NLD-594:** Convert decorative an non-decorative images ([141a1a8f](toegang-voor-iedereen/backend/lib/nldoc_conversion_writer_html@141a1a8f))