Circuit Editor Experience

This is the tracking issue for features related to the circuit editor experience. The current MVP is to give users the ability to create and edit circuit diagrams alongside Q# code and have these be interoperable in Q# projects.

## MVP Tasks

- [x] Clean up prototype code.
- Remove extra "edit" state which is getting in the way.
- [x] Edit Mode vs. Readonly Mode
- [x] Add/Remove qubit lines
- [x] Add support for controlled/adjoint gates. (week)
- [x] Add new circuit files (maybe a week given current design)
- [x] Iterate on circuit representation format (large item, needs more design)
- [x] Implement cleaner UI (large item, needs more design and input from team)

## Advanced Features

- [ ] Change measurement output representation
- [ ] View generated Q#
- [ ] Conditional Branching
- [ ] Sub-operations
- [ ] Loops
- [ ] Qubit alloc/dealloc
- [ ] Circuit Visual Pivot
- [ ] Embed Q# code in circuits
- [ ] Jupyter Notebook experience
- [ ] Trace Circuit vs. Logical Circuit
- [ ] Circuit Gen from QIR