Improve documentation on how to use the default exported `__wbg_init`

[aiktb]

This library is a solid alternative to the long-unmaintained kuromoji.js, and it avoids many of pitfalls.

For example, kuromoji.js:

1. Cannot load a user dictionary.
2. Relies on XMLHttpRequest, which breaks in Service Worker environments.
3. Uses callbacks heavily, leading to spaghetti code.
4. Uses 1-based subscripts.
5. Depends on zlib.js, which doesn’t run in the browser.
6. Depends on path, a Node.js core module.
7. Is not ESM-compatible.

Although there are several forks of kuromoji.js that try to fix these problems, none of them are well maintained.

I was able to replace kuromoji.js with this library, but it took a few hours and I ran into some issues:

• There were no examples of using this library with a Vite-based bundler. Since Vite has limitations around WASM bundling, lindera-wasm was not bundled automatically, causing the browser to throw a tokenizerbuilder_new does not exist error.
• After some research, I discovered I could exclude the WASM file from bundling by placing it in public/. This solved the first issue, but then I faced a second one: how to tell lindera-wasm where the WASM file is located? The documentation didn’t cover this.
• Eventually, I inspected lindera_wasm.js and found that calling the default-exported __wbg_init function with the WASM path solved the problem.

The documentation and JSDoc should be improved to explain this setup more clearly.

I’d be happy to submit a PR.

[sapjax]

Here is an example of vite.config.js for Chrome extension:

import { defineConfig } from 'vite'

export default defineConfig({
  optimizeDeps: {
    exclude: [
      "lindera-wasm"
    ]
  },
  server: {
    cors: {
      origin: [
        /chrome-extension:\/\//,
      ],
    },
  },
})

and you can instance the TokenizerBuilder after init:

import __wbg_init, { TokenizerBuilder } from 'lindera-wasm';

__wbg_init.then(() => {
    const builder = new TokenizerBuilder()
    //...
})

[mosuka]

@aiktb @sapjax
I'm not very familiar with this matter, so I'd be happy to receive a pull request.
Thanks!