Update package scripts for dash-bio

[HammadTheOne]

As per the comment in #548, the package script for dash-bio should be updated to reflect the current repo structure and bring them in line with other component libraries:

using perhaps dcc as a model: there should only be three build scripts: build:js, build:backends (builds Py, R, and Jl using dash-generate-components, no python -c, no get_version_info.py), and build to combine them. Assuming our source mapping is set up correctly there is no reason for build:dev or build:js-dev.

This will clean up unnecessary scripts and make it easier to develop and track the steps during package build.