Add Pub/Sub support to dashboard

[meowmeowahr]

In its current state, the KevinbotLib Dashboard does not support RedisCommClient's Pub/Sub communication features.

Why?

• Adding pub/sub support will allow for the use of buttons, or other quickly-updating data.
• Some of the Control Console's internal data (such as battery status and logs) use pub/sub.

How?

• New widgets that use pub/sub will need to be created.
• The sidebar will need to be tabbed, allowing for a "Set/Get Data" and "Pub/Sub Data" tab.
  • The set/get tab will remain identical to the current sidebar contents
  • The pub/sub tab will likely only contain buttons to add widgets, and no auto-discovery tree.
• Attempting to add widgets will open a "Widget Add Wizard" that will prompt the user for the pub/sub channel.