Switch build system from Parcel to Vite

[Keavon]

We switched from Webpack to Parcel, but it's been causing lots of problems. We need to switch to Vite instead.

[Keavon]

@mdonoughe for tracking purposes, I'd like to assign this completed issue to you. GH requires that you reply here before I can do that. Thanks!

[mdonoughe]

Okay