Make scopes read-only by default

[joshdifabio]

Presently it would be quite easy to delete/modify data on a production site by mistake.

Perhaps we could consider making scopes* read-only by default, and require some kind of configuration change to enable write mode for a scope. E.g. sdm-config enable-write m2:tech21.com.

It would be easy to forget to disable write mode for a given scope after running some operations, so perhaps we could consider one of these options to help avoid leaving write mode enabled by mistake:

• write mode can only be enabled for one scope at a time. I.e. enabling write mode for one scope disables it for other scopes
• write mode is auto-disabled after a certain period, e.g. a few minutes or an hour. Long running write operations should still be supported

*A scope is a Magento instance, a Shopify shop, a BigCommerce store, etc.

[cwilson-S48]

While this hasn't been implemented Josh did setup a system so that if a store is considered "Live" SDM will present a warning and provide a 15 second delay before running the command. Thus making it harder to delete/modify data on a production site