Fix long Asset's description display

[aurelticot]

For the moment, the description in the Asset details pages are not truncated.
According to the design, it should be limited to 5 or 6 lines and if longer, display an ellipsis and a show more button to expand and reveal the full description.

While truncating the text to 5/6 lines is easy (with class line-clamp-x), knowing when to display a "show more" button and handling its behaviour is more challenging. It is possible with CSS only but will have to double check with Tailwind.

This ticket aims to address this.