[Feature] Parallel Executions within a single web worker

[iamalwaysuncomfortable]

🚀 Feature - Parallel Executions within

In the normal flow of a web app. Users may trigger multiple executions of Aleo functions. Currently this would require that either the user wait for a previous function to complete before executing another, or spinning up multiple webworkers to handle this.

Optimally users should be able to execute multiple functions onto a single web worker and have them run in parallel.

Implementation

• Allow any function execution or deployment to be added a worker thread
• Provide the API and documentation within the for users to apply it
• Create integration tests + a create-aleo-app example which acts as an integration test