Fix typescript output, make build and dev faster by using esbuild/vitest

[jonluca]

Summary

The typescript output was actually just es code output, not types. This fixes it so that the output is the actual declarations.

Key Changes

• Change build system to use esbuild, which is significantly faster
• Change test system to use vitest, which is significantly faster
• Change playground to use vite
• Fix typescript output
• Bump package versions