Combine .wasm and .js files

[mainnet-pat]

• Compile wasms into single file
• Use postprocessing to compress the base64 encoded wasms
• Add new way to load web worker

The latter is especially useful in browsers. Place the following line

LibraryUtils.setWorkerLoader(() => new Worker(new URL("monero-ts/dist/monero_web_worker.js", import.meta.url)));

before interacting with any code which relies on webworker.

Resolves #248