InsertOoxml support for powerpoint for office-js based powerpoint add-in.

We need to have a similar capability of insert OXML into shape object in PowerPoint office-js based add-in, which is available for the word add-in.

The current API is very limited even if we want to render a nested bullet list it's not possible to render that using the current available API.

Please enable the same capabilities in power point add-in as well. Here is the link for the API which is available in word office-js based add-in.

https://learn.microsoft.com/en-us/javascript/api/word/word.contentcontrol?view=word-js-preview#word-word-contentcontrol-insertooxml-member(1)