[Chore] Build script improvements

[simmo]

Currently, each package has a tsconfig.json that extends the one in the root, with a build script that calls a centralised script. This script uses the directory from where it was called to run the TS compilation/build.

Tasks

• Remove tsconfig files from packages
• Update and move build script to work with go script in the root
• Build script should use a prompt for package selection, if cwd is not a package
• TS should run in the root, configured for the project