Enable preserveSource of rollup-plugin-web-worker-loader

[KentoMoriwaki]

Ref: #1308

This change modifies the build output `` as detailed below:

Before

var WorkerFactory = createBase64WorkerFactory('Lyogcm9sbHVwLXBsdWdpbi13Z...', null, false);

After

var WorkerFactory = createInlineWorkerFactory(/* rollup-plugin-web-worker-loader */function () {
(function () {
    '__worker_loader_strict__';

   --- SOURCE CODE HERE ---

})();
}, null);

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Latest commit: 7a49068

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[KentoMoriwaki]

I tried using this build locally to record canvas, but it did not work correctly (the initial drawing is saved, but the modifications are not).
Interestingly, when I disabled minification in Vite for my application, the canvas recording functioned correctly.

It seems this change has the potential to break existing applications, and it might be necessary to alert users to modify their settings accordingly.

[eoghanmurray]

As per Justin, it wasn't deliberate that it was base64 encoded

[daibhin]

Can confirm that this is breaking in production since upgrading recently