Suggestion for JS workspace improvements

Assume `lerna` stays.

**Task**: remove `babel`
**Reason**: not needed anymore

**Task**: delete `package-lock.json` from all packages keep only one at the `js` root folder.
**Reason**: It is not necessary to have lock file in each package when you have a workspace

**Task**: move all `devDependencies` from each `package.json` to the root `package.json`.
**Reason**: it makes maintains/updating/install much simpler and keep the infra unified

**Task**: avoid `.sh` scripts and convert them to `.js`
**Reason**: better cross platform (Windows) support

**Task**: move `tsconfig` to the `js` root and extends each package
**Reason**: unify the configuration between packages, also since the build does not uses typescript the `tsconfig` is only used by the IDE.

**Task**: add prettier
**Reason**: enforce similar code format

let me know what if this sounds reasonable.