Added "preserve.prompt" config option for not changing PS1 in activated environments.

[mitchell-as]

DX-2152 Users Can Disable State Tool Prompt Edits

[MDrakos]

This looks great to me. My only contention is the actual config option itself. I feel like having ps1 in the config key name could be a bit too specific/technical. I'd like to get @rawktron's opinion on the key.

As it stands the user would run state config set preserve.ps1 true

[mitchell-as]

I feel like anyone who actually cares about this setting would know what ps1 is :) I agree that @rawktron should approve this though.

[rawktron]

I feel like anyone who actually cares about this setting would know what ps1 is :) I agree that @rawktron should approve this though.

What about preserve.prompt which is slightly more descriptive in terms of what it does?

[mitchell-as]

I've updated the user-facing config key to use preserve.prompt, but kept the internal PS1 references in the code because they make sense in that context.