[api-minor] Replace the canvas package with @napi-rs/canvas

The `@napi-rs/canvas` package has fewer dependencies, which should *hopefully* make installing and using it easier for `pdfjs-dist` end-users. (Over the years we've seen, repeatedly, that `canvas` can be difficult to install successfully.)
Furthermore, this package includes more functionality (such as `Path2D`) which reduces the overall number of dependencies in the PDF.js project.

One point to note is that `@napi-rs/canvas` is a fair bit newer than `canvas`, and has a lot fewer users, however looking at the commit history it does seem to be actively maintained.

Note that I've successfully tested the [Node.js examples](https://github.com/mozilla/pdf.js/tree/master/examples/node), in particular the `pdf2png` one, with this patch applied and things appear to work fine.

Please see:
 - https://www.npmjs.com/package/@napi-rs/canvas
 - https://github.com/Brooooooklyn/canvas

gulpfile.mjs

@@ -2256,8 +2256,7 @@ function packageJson() {
     bugs: DIST_BUGS_URL,
     license: DIST_LICENSE,
     optionalDependencies: {
-      canvas: "^3.0.0-rc2",
-      path2d: "^0.2.1",
+      "@napi-rs/canvas": "^0.1.60",
     },
     browser: {
       canvas: false,