add charton plotting

[wangjiawen2013]

Hi,

I have made the modifications based on your suggestions, but I encountered several issues. Some of the tests in the book appear to be insufficient; for instance, the code examples do not take WASM compatibility into account. Many examples from the book might fail to run in a WASM environment.

Specifically, the df-interchange = { version = "0.3", features = ["polars_0_50", "polars_0_51"] } dependency in Cargo.toml likely won't compile under WASM. Furthermore, the Polars parquet feature has known issues in WASM environments (for details, please refer to Polars Issue #25857).

Additionally, the plotting data used in the book is plotlars-specific. It is only suitable for a few specific types of charts and contains a large number of repetitive integers, making it poor input data for Charton. Therefore, I decided to use Charton's built-in data for the user demonstrations and avoid compatibility issues among different polars versions (In fact, Charton uses polars-io parquet series, not polars parquet feature to bridge the dataframe among these versions, which can be found in charton's tutorial). This ensures users realize that Charton is a powerful, viable alternative to Plotlars for data visualization.

I have submitted a new Pull Request. After weighing all factors, I believe this Pull Request represents the most straightforward approach. Otherwise, both of us would need to make significant revisions to the book's content, which wouldn't be cost-effective for either of us. I hope you will take these factors into consideration.