Option to use existing dir structure when using globs

[Jasperrr91]

When defining the srcFiles with globs, like "srcFiles": ["./scripts/assets/tmp/**/*.svg"], I would expect the folder structure to remain intact. So input/24/foo.svg and input/32/foo.svg should be outputted to dist/24/foo.icon.ts and dist/32/foo.icon.ts. However, the current behaviour of svg-to-ts is to output as out/prefix-foo.icon.ts. Libraries like @svgr/cli do handle this correctly by default.

According to the reply in #196 , it is possible to define the config as an array but this is a needless hassle. An opt-in option to follow the current file structure would be much appreciated. And on that same matter, svg-to-ts currently does not output any warnings if it encounters a file with the same file name. So even though only one entity of foo.icon.ts is outputted while two have been given as input, the user is not warned of this. A warning would also be very welcome.