Move fix-bin script to Bob

https://github.com/Urigo/graphql-mesh/blob/master/scripts/fix-bin.js

We usually build the projects after `yarn install` so Yarn workspaces cannot "symlink" to the actual `bin` script under `dist` built by `bob`.
This script manually symlinks `bin` under node_modules of other packages to point to the correct built `bin` scripts.
So you can use `packages/*-cli/dist/cjs/bin.js` as `*-cli` directly in another workspace project(example maybe)