Visualization of classically-controlled operations for %trace

[theRoughCode]

Is your feature request related to a problem? Please describe.
As a developer, I might want to visualize the circuit associated with the execution of a Q# operation at any point in time. This would make debugging easier and even allow tutorials/notebooks to be more visual.

Describe the solution you'd like
The circuit should be displayed (as an SVG/HTML/image) based on a new magic command (i.e. %trace operation_name). This %view command will follow similar semantics for arguments as %simulate with the result instead being the printing/visualization of the circuit.
The circuit displayed should represent the operations invoked starting directly from the EntryPoint up to n levels deep (where n is a configurable attribute via %config trace.defaultDepth={n}).
For certain well-known operations, we will show their custom display, such as:

• SWAP
• M
• Measure
• Operations under the Microsoft.Quantum.Array namespace
• CNOT
• Controlled operations (can be controlled on classical registers)
• Adjoint operations

Other operations will just show their name as a label (with non-qubit arguments) inside a box. The boxes should increase in width to fit the label.

Additional context
Other examples of quantum circuit visualizers:

• Quantum Inspire
• quantum-circuit
• Bono
• Circuitizer

Components to implementing this feature

• Simulator hook to convert incoming operations into a JSON string for rendering (#301 and Add ExecutionPathTracer to repo. #195)
• JS visualizer that takes in above JSON and returns the HTML visualization (Add path visualizer JS files #201)
• Add magic command to IQ# to tie everything together (Add trace magic command #209)
• Implement ApplyToEach functionality (#296 and Add composite operation handling #219)
• Implement classical control functionality.
• Add sample doc to document feature (#390).