EmailIt: First Release Candidate for 2.0

This version of EmailIt doesn't have a node program with it. It is fully go language backend with the frontend done in Svelte. It's updated to the latest Wails version and all libraries have been updated as well. Since so much has changed, it really needs thorough testing.

This is a Universal macOS build that should run on Intel or M1/M2 chip systems. I've only been testing on a MacBook Pro M1 system. Nothing is OS dependent in this release (I think!). Therefore, it should easily compile to other OSes as well. If you compile and run on a different system, send me you compile and I'll add it to the repo. If it doesn't work, please file an Issue and help me debug the program.