Standalone Invoke AI app

[Millu]

Summary

InvokeAI is currently installed through a Python script that can be confusing to install for users who are not technically savvy and are looking for an easy way to get started with InvokeAI.

Packaging InvokeAI into an Electron app that is able to be downloaded and ran without needing to worry about environment setup will allow the project to reach a much wider user base, encouraging adoption of the platform by users of all backgrounds.

Intended Outcome

InvokeAI is able to be downloaded as a desktop application and does not require environment setup through the terminal.

[Njordy]

Why removal? :(