HARK AgentType wrapper around Dolo model

[sbenthall]

The inverse of trying to export HARK to Dolang (see #659)

This issue is for an AgentType class that:

• starts with a fully formed Dolo model, like the kind you get from a parsed Dolang YAML file
• builds all the getStates, getShocks, etc. methods needed for simulation out of the materials in the Dolo model
• Ideally, also setting things up so that a solution can be passed in...
• and can be ran as a simulation.

[llorracc]

What exists:

Dolang (yaml) -> Dolo (py-obj)

What this issue is about:

Dolo (py-obj) -> HARK (py-ob)

---

Others things that we might do, not in this issue:

HARK -> Dolo

Dolo (py-obj) -> Dolang (yaml)

HARK -> Dolo (py-obj) -> Dolang (yaml) -- might be the best implementation for #446