[FEATURE] Add support for JAVA images

[duaraghav8]

Is your feature request related to a problem you're facing?
At the moment, dockershrink only supports docker images for Nodejs applications.
Java images do not get optimized for size.

Describe the solution you'd like
dockershrink optimize can detect whether an image is for a nodejs app or a java app and apply suitable optimizations.

Additional context
This is not a tiny feature, but a very big effort to undertake.
I need more inputs from the community, especially about Java-specific strategies to reduce image size that we can implement.

This issue will help us understand what java support should look like (at least the initial release of it)