Custom Analysis Support

[aviralpandey]

Updates HDL21 to export custom_analysis and raw strings with analyses.

[dan-fritchman]

This requires Vlsir/Vlsir#33, correct?

[aviralpandey]

Yes, that's why the tests are failing right now

[dan-fritchman]

So given most of the simulator-stuff is dependent on Vlsir/Vlsir#33, which (as of this writing) remains a draft - you wanna spin off the primitives / MosParams stuff separately?

[aviralpandey]

The name raw isn't great, a better name would be something like suffix or raw_suffix to be more descriptive of the it's function.

[aviralpandey]

Type when setting to proto should check whether the input is None. In to_proto optional[str] should be converted to str.