Support svg image format

[yvermabp]

No description provided.

[asolntsev]

As far as I see from source code, FS doesn NOT support SVG images.
There are examples using SVG, but they incorporate an external library "svgSalamander.jar" which seems to be obsolete.

I think we can add support for SVG images using library like https://github.com/css4j/echosvg or https://xmlgraphics.apache.org/batik/

Also, we could take inspiration from https://github.com/danfickle/openhtmltopdf/tree/open-dev-v1/openhtmltopdf-svg-support (which was kind of a fork from FlyingSaucer, but doesn't seem to be maintained anymore).

[MauricioKiniz]

@asolntsev, Thank you very much for reviewing my request!

[andrewisnheskitotvs]

I'm interested in the feature.