Pull from publish target (PVA scenario)

[tonyanziano]

As part of the PVA integration, there will be a scenario in which the user tries to publish to PVA, and the bot content is out of sync with what is stored in PVA.

In this case, the user will need a way to sync their bot content by "pulling" from the publish target.

For now, we want to enable this only for the PVA scenario, and then later we want to add this functionality in a general sense to any publishing plugin that wants to / can implement it.

Requirements:

• [P0] Add notification UX when content is out of sync (412) to launch into pull UX
• [P0] Backup old bot content
• [P0] Copy new, pulled bot content into bot project directory
• [P1] Make UX more user-friendly
  • allow user to select where to backup
  • let the user know where they just backed up