Add Example Algorithm with IndicatorVolatilityModel

[AlexCatarino]

Expected Behavior

LEAN provides an example of IndicatorVolatilityModel for documentation.

Actual Behavior

There is no example for this feature.

Potential Solution

Adds an example and/or unit tests.

Checklist

• [x] I have completely filled out this template
• [x] I have confirmed that this issue exists on the current master branch
• [x] I have confirmed that this is not a duplicate issue by searching issues
• [x] I have provided detailed steps to reproduce the issue