Run without blocking main or run inside of worker

[StrangeBytesDev]

Currently webview.run() blocks the main thread, which limits your ability to run any kind of backend code, like a web server. Additionally, this currently doesn't work in a Worker script, although there is potentially a solution to this implemented here: https://github.com/primatejs/worker-bin

If it was possible to either run without block main or in a Worker, it'd make this much more useful for developing full on applications. I'm currently experimenting with using alternative methods for running the webview outside of the main thread, like node's worker_threads. I'll report back if I get anything working.

(Thanks for the great work on this! I'm extremely excited to use this in applications.)