feat: Added Into<DataFrame> trait to JsDataFrame

[inakineitor]

Pull request associated to issue #327.

[Bidek56]

Any reason you are using alpha version here? This is a stable library, hoping to avoid living on the edge.

[Bidek56]

This needs to match polars rs-0.47 branch which currently is on nightly-2025-04-19
We also need to use the same nightly for CI/CD.

[Bidek56]

5 deprecated warnings:

warning: use of deprecated struct `napi::JsFunction`: Please use `Function` instead
 --> src/file.rs:3:20
  |
3 | use napi::{Either, JsFunction, JsObject};
  |                    ^^^^^^^^^^
  |
  = note: `#[warn(deprecated)]` on by default
warning: use of deprecated struct `napi::JsFunction`: Please use `Function` instead
  --> src/file.rs:50:27
   |
50 |         let stream_write: JsFunction = self.inner.get_named_property("push").unwrap();
   |                           ^^^^^^^^^^
warning: use of deprecated struct `napi::JsFunction`: Please use `Function` instead
  --> src/file.rs:65:27
   |
65 |         let stream_write: JsFunction = self.inner.get_named_property("write").unwrap();
   |                           ^^^^^^^^^^
warning: use of deprecated method `napi::Env::create_buffer_with_data`: Use `BufferSlice::from_data` instead
  --> src/file.rs:51:30
   |
51 |         let bytes = self.env.create_buffer_with_data(buf.to_owned()).unwrap();
   |                              ^^^^^^^^^^^^^^^^^^^^^^^
warning: use of deprecated method `napi::Env::create_buffer_with_data`: Use `BufferSlice::from_data` instead
  --> src/file.rs:66:30
   |
66 |         let bytes = self.env.create_buffer_with_data(buf.to_owned()).unwrap();

[Bidek56]

Tests fail due to: Property 'maintainOrder' does not exist on type 'CsvWriterOptions'.

[inakineitor]

Hi! Sorry, I did not realized that the commits made after creating the pull request would retroactively affect the PR. This was supposed to contain only the change in the title, and everything else I was gonna make a dedicated issue and PR for.

All the commits after the first are a very early attempt at migrating this library to the latest (0.47) version of polars.

Also, napi-3 is not needed. I was just testing whether their wasm target works, because it would be a fairly quick way of adding non-stable WASM support to the JS polars.