Resize method - cap on width & height

[bryancua]

The ResizeImage method takes in the target (width) of the image and attempts to calculate the height based on the ratio. There is a chance, however, that that the target height exceeds the bounds of MaxImageDimension which is currently set at 4096.

We should either:

• return an error if this should happen
• calculate the largest possible integer width to result in a height closest to 4096px.

[tmathews]

I wanted to make more use of the fitting methods in the resizing library we are using. The 4K limit was an arbitration put by me. Would be nice to provide more query param options for resizing.