[Feature request] Automatic width text elements #348

First off, this is an excellent project, thanks for making it open-source!

Currently, all elements must specify their width. Would it be possible to make this optional, at least for text elements, and let them grow horizontally the same way they grow vertically?

interface PPTTextElement {
  width?: number;
  height?: number;
}

Reasoning: when generating content for the presentation (without user gesture) it's hard to reason about size of the textual elements, client could compute them automatically.