Suggest to add support to resize image by "IMAGE_URL =WIDTHxHEIGHT"

[hygensos]

This is a very cool extension! And I met a problem of resizing the image, I know we can use html tag to resize the image, and it does work when exporting it to pdf. I am using azure ADO to manage my source code, but seems ADO does not support relative src path in tag, so I am thinking if we can support the following markdown format: IMAGE_URL =WIDTHxHEIGHT
Example:

![example 1](./img/foo.png =400x300)
![example 2](./img/foo.png =300x)

Here is the reference: https://github.com/MicrosoftDocs/azure-devops-docs/blob/main/docs/project/wiki/markdown-guidance.md

Thanks.

[hygensos]

https://github.com/tatsy/markdown-it-imsize