Remove ./dist/dist folder
Currently, build assets are copied to ./dist/dist, in order to make tests work from Node.js, e.g. `npm run test -- --grep "Sample code demonstration"`

The build assets are copied to the nested folder as part of the [`build_commonjs`](https://github.com/woodser/monero-ts/blob/66c8ae176b634f6ec07d73fc471399658d0cc32e/package.json#L16) script in package.json, and referenced from [LibraryUtils.ts](https://github.com/woodser/monero-ts/blob/66c8ae176b634f6ec07d73fc471399658d0cc32e/src/main/ts/common/LibraryUtils.ts#L25).

This issue requests getting tests to work in Node.js without needing the ./dist/dist folder, and deleting this folder.