Android Studio plugin modifying the XML layout editor

I want to implement an Android Studio plugin with the following features, can anyone give me some pointers about how to achieve it? (If it's not feasible to implement with the open APIs, what would be some alternative ways to achieve similar goals?)

In current Android Studio (e.g., Android Studio 4.0 which I took the screenshot with), the "Pick a Resource" window will pop up if I click on the album icon in the "src" field of the "Common Attributes" panel. Then I can look up icons by searching keywords in the "Pick a Resource" window.

My goal is:

1) to expand the search results. I hope to integrate online search results from websites like https://thenounproject.com

2) to automatically fill the contentDescription attributes (aka image alt-text) when selecting an icon from the list.

Thanks in advance for any help!