Is it possible to add support for Graphviz files (dot graph description language; extension .gv or .dot)?

It would also be great if Graphviz-generated SVG files could be ignored, especially if the .gv source files are in the same folder and have the same name.

SVGs have the following header:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
 "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<!-- Generated by graphviz version 2.47.3 (20210619.1520)
 -->

OS: macOS 11.4
scc version 3.0.0