Add npm package using napi-rs

[remorses]

Fix #6

The npm package is currently published as @xmorse/markdown-rs

This npm package will also support WASM. Most of the CI has been ported from the oxc-resolver package.

Still a WIP, the exported functions need to be thought out better, for now I am experimenting.

Things to do before merge:

• re-enable windows builds
• rename from @xmorse/markdown-rs to markdown-rs (or other available name)
• fix benchmark, which now does not work because of a Vitest bench bug, all benchmarks take 0ms

[wooorm]

Wow, cool work! It’s a lot, will take some time to review. And, also I am sure you can find stuff if you self-review.
Do you have any questions for me? Anything you want me to look at?

[remorses]

Here is the benchmark result on the Zod v3 mdx documentation

clk: ~3.25 GHz
cpu: Apple M2 Pro
runtime: node 24.2.0 (arm64-darwin)

benchmark                           avg (min … max) p75 / p99    (min … top 1%)
--------------------------------------------------- -------------------------------
markdown-rs parse                     16.33 ms/iter  16.57 ms             █▄
                              (15.29 ms … 17.08 ms)  17.04 ms        ▅ ▅ ▅██ ▅  ▅
                            (  1.21 mb …   1.22 mb)   1.21 mb ▅▁▁▁▅█▅█▅█▁█████▅▅█▁█

remark parse                          42.02 ms/iter  43.75 ms ██
                              (39.96 ms … 46.92 ms)  46.26 ms ██
                            ( 10.46 mb …  44.35 mb)  15.31 mb ███▁██▁▁▁▁▁▁█▁▁▁▁█▁▁█

summary
  markdown-rs parse
   2.57x faster than remark parse

--------------------------------------------------- -------------------------------
markdown-rs parse without parsing js  16.14 ms/iter  16.31 ms          █
                              (15.63 ms … 16.81 ms)  16.64 ms      ▅ ▅▅█ ▅  ▅ ▅
                            (  1.21 mb …   1.21 mb)   1.21 mb ▅▅█▅▁█▅████████▁█▅▁▅▅

remark parse                          41.73 ms/iter  41.63 ms    █
                              (39.68 ms … 47.57 ms)  45.96 ms █ ██
                            (841.99 kb …  14.55 mb)  11.21 mb █▁█████▁▁▁▁█▁▁▁▁▁▁▁▁█

summary
  markdown-rs parse without parsing js
   2.59x faster than remark parse

--------------------------------------------------- -------------------------------
markdown-rs html                       7.86 ms/iter   8.03 ms         ▃ █▃
                                (7.34 ms … 8.29 ms)   8.29 ms     ▃█▆▃█▃███ ▃▃ ▃ ▃▃
                            (186.48 kb … 186.64 kb) 186.51 kb ▄▆▄▁█████████████████

remark html                           41.38 ms/iter  42.53 ms     █
                              (39.16 ms … 46.77 ms)  43.76 ms ▅▅▅▅█ ▅ ▅  ▅   ▅ ▅  ▅
                            (  6.65 mb …  14.85 mb)  12.03 mb █████▁█▁█▁▁█▁▁▁█▁█▁▁█

summary
  markdown-rs html
   5.27x faster than remark html

[remorses]

Notice that the bigger files like index.js and browser.js are generated by NAPI-RS

The important parts live in the lib.rs file. That is the interface exported to the npm package. You can also take a look at the tests, which mostly consist of inline snapshots.