Get new file version limits

[milanholemans]

Let's add new versioning capabilities to SharePoint lists.

Get file versioning capabilities

Expand spo list get command with VersionPolicies navigation property which looks like this:

{
    "DefaultExpireAfterDays": 0,
    "DefaultTrimMode": 0
}

So we have to expand the VersionPolicies property here.

DefaultTrimMode is an enum, I suggest we add another property called DefaultTrimModeValue that contains the label of the value.

Label	Value
NoExpiration	0
ExpireAfter	1
AutoExpiration	2