Make our samples embedable

We need to make our chart samples embeddable, in this way, we can put them in our documentation as an interactive sample

[This article](https://docs.flutter.dev/deployment/web#embedding-a-flutter-app-into-an-html-page) from flutter might help

Start by reading the linked Flutter article about embedding a Flutter app into an HTML page, then inspect how this repository's chart samples are organized. Clarify the embedding approach and which samples are in scope before implementing it; done means the samples can be embedded as interactive examples in the documentation.

Written by the indexing model from the issue text.