Add command to setup dev environment with ENS and APM deployment

[izqui]

Instead of working in a custom deploy flow for our own development environment for Aragon apps, we should generalize this at the aragon-dev-cli level to setup a complete environment.

$ aragon-dev-cli setup [--registry-name Domain name for registry (default: aragonpm.test)]

Steps needed:

• Deploy an ENS instance a create the needed subnodes until registryName is owned by the sender.
• Deploy an APM instance with the rootnode for registryName. Call apm.setResolver().

This migration file for APM where all this steps are performed can be used for reference.

We need a way to save both the ENS and the registry name so that following aragon-dev-cli executions automatically use them (maybe add them to a config file that gets read if no flags are provided?).

[onbjerg]

I edited your comment to standardize the flag name (--registry-name as oppposed to --registryName).

Added for 1.1.0.

[izqui]

New ENS and APM Factories should make this task way easier :) https://github.com/aragon/aragonOS/tree/dev/contracts/factory

[izqui]

Irrelevant thanks to https://github.com/aragon/aragen