fix(PropertySet): AddProperty throws on every call — wrong hashtable.Add signature

[HeyItsGilbert]

Summary

PropertySet.AddProperty calls $this.Properties.Add($Property) with a single argument. Hashtable.Add requires two arguments (key, value). This throws at runtime. The method has never been successfully invoked.

File

Gatekeeper/Classes/Property.ps1:148-151

Reproduction

$ps   = [PropertySet]::new('Test')
$prop = [PropertyDefinition]::new('Env', @{ Type = 'string' })
$ps.AddProperty($prop)
# Throws: Method invocation failed because [System.Collections.Hashtable] does not
#         contain a method named 'Add' with 1 argument

Fix

[PropertySet]AddProperty([PropertyDefinition]$Property) {
    $this.Properties.Add($Property.Name, $Property)   # was: .Add($Property)
    return $this
}

Notes

• Good first issue — single-line fix
• Found by Jordan B., Sage Nakamura, Chip Torres, and Glenn