Compile node package as CommonJS module

[simolus3]

In the @powersync/node package, this adds rollup to bundle the ESM modules emitted by tsc modules into a CommonJS module. Two places in the package are using import.meta.url which I had to replace since the CJS bundle is at a different path. We use a custom entry in import.meta (also set by rollup) to detect when the package has been compiled to a CJS module.
As a fallback (e.g. when users are applying their own bundler that might not set the import.meta entry), I've also added options to customize how the worker is loaded.

I've used this file to test this:

// demos/example-node/src/test.cjs
const { PowerSyncDatabase, Schema, Table, column } = require('@powersync/node');

const lists = new Table({
    created_at: column.text,
    name: column.text,
    owner_id: column.text
  });

const main = async () => {
  const db = new PowerSyncDatabase({
    schema: new Schema({lists}),
    database: {
      dbFilename: 'test.db'
    }
  });

  console.log(await db.get('SELECT powersync_rs_version();'));
  await db.close();
};

main();

[changeset-bot]

🦋 Changeset detected

Latest commit: 5054658

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@powersync/node	Patch

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[stevensJourney]

Happy with these changes :)