Add command line interface for bootstrapping self-contained environments

[glopesdev]

Deploying self-contained bootstrappers is becoming more and more an established practice when setting up reproducible experiment workflows. However, these environments currently have to be initialized manually, or by downloading some script/command templates from a documentation website.

The deployment process is now sufficiently self-contained and optimized that this could be provided directly as a command-line flag allowing to initialize a bootstrapper environment in a specified directory. The command-line interface could also provide an easy way to open or initialize environments configured in specific folders, which could open the door to allow opening .bonsai files in the correct environment by double-clicking a workflow directly in an appropriately configured directory structure.