Add JSON Schema example

[danielgtaylor]

The example is pretty basic, but shows how a simple example could look and includes a list of strings.

[kylef]

Perhaps it would be nice to also include an example of an MSON described data structure with a JSON schema to emphasise you can override generated schemas for MSON structures.

[pksunkara]

Perhaps it would be nice to also include an example of an MSON described data structure with a JSON schema to emphasise you can override generated schemas for MSON structures.

I think that should be another example on it's own along with the other Attributes examples.

Reviewed.

[danielgtaylor]

@kylef @pksunkara should I add another example with MSON or should that be a separate PR?

[pksunkara]

@danielgtaylor You can add it to this PR.

[pksunkara]

Just minor indentation issues.

[danielgtaylor]

@kylef @pksunkara updated with your feedback. Please take another look!