Add project: termtosvg - Record terminal sessions as SVG animations

Nobody has claimed this yet.

## Basic info

**Application name**: termtosvg
**Application repo link**: https://github.com/nbedos/termtosvg
**Application home link**: https://nbedos.github.io/termtosvg/
**Application description**: Record terminal sessions as SVG animations

## Qualifications

There are a ton of great Python projects out there, but what makes an
application "Awesome™"? Please check that all of the following criteria apply:

- [x] Free software with an online source repository.
- [x] Using Python for a considerable part of their functionality.
- [x] Well-known, or at least prominently used in an identifiable niche: 8.8K stars
- [x] Maintained or otherwise demonstrably still functional on relevant platforms.
- [x] An application, not a library or framework.

Note that installability via pip/PyPI and a developer-audience focus
may warrant a higher standard for inclusion, in keeping with the
spirit of the list:
http://sedimental.org/awesome_python_applications.html

## Additional notability info

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Start by reading the comments and nearby examples in projects.yaml, then review the termtosvg repository and description linked in the issue. The work is done when termtosvg is represented by the requested 2–3 lines in projects.yaml and the file remains consistent with its existing entries.

Written by the indexing model from the issue text.