Nanosvg initial integration

[JakubHanzalik]

NanoSVG is a simple stupid single-header-file SVG parse. The output of the parser is a list of cubic bezier shapes.

The library suits well for anything from rendering scalable icons in your editor application to prototyping a game.

Integration request

[github-actions[bot]]

JakubHanzalik is integrating a new project:
- Main repo: https://github.com/memononen/nanosvg.git
- Criticality score: 0.51915

[DavidKorczynski]

This one is already up: https://github.com/google/oss-fuzz/pull/11944 (actually a trophy of https://github.com/google/oss-fuzz-gen/tree/main/experimental/c-cpp)