[Tasks 4/5] Add left-hand menu bar

[smburdick]

Is your feature request related to a problem? Please describe. The revised task flow calls for a left-hand menu bar for specifying circuits, etc.

Describe the solution you'd like We can start with a static menu bar, with a dynamic set of buttons. We can make it retractable later.

Needs the following buttons:

• [ ] Create canonical plaquette (similar to how it is currently implemented)
• [ ] Create Stim plaquette (not yet defined)

Describe alternatives you've considered Through the current frontend, you can only specify circuits by clicking on the plaquette and choosing from the menu. Let's move that functionality out to the sidebar.

Additional context It can be the same color as the background (blue), but without any grid lines.

[smburdick]

I think we can get away with just having a static list of buttons like we do now. In the future, we can upgrade that to a hamburger icon menu.