Organize workspace commands into submenus for each resource type

[alexweininger]

As more Azure extensions integrate with the workspace view and add commands to the workspace view title, it is getting crowded.

Instead of putting all commands on the view title. We want to organize the commands by having a single command on the title bar for each resource type. These commands will either bring up submenus or quick picks to select a command to run.

Submenus:

Quick picks: