feat: adds svg_icon fixes #529

[ghchinoy]

Adds an example of a web component svg_icon that takes an SVG XML and renders it

[wwwillchen]

Thanks for contributing!

Could you create an "svg_icon_app.py" to demonstrate how to use this web component? e.g. we do this for our other web component examples: https://github.com/google/mesop/blob/main/mesop/examples/web_component/quickstart/counter_component_app.py

And then you can import it here: https://github.com/google/mesop/blob/main/mesop/examples/web_component/__init__.py and then this will load the app into the main Mesop example app, e.g. when you run ./scripts/cli.sh

[wwwillchen]

I think there's some formatting issues which could be solved by installing our pre-commit hooks: https://google.github.io/mesop/internal/development/#commit-hooks

[wwwillchen]

Thanks for contributing!