Created MAC Docs release history baseline

Property	Value
description	Started documenting MAC product releases directly in the `mac-docs` log tree.
version	0.64.0
type	Create
related	MAC Docs, Release History

• Marked v0.64.0 as the first formal MAC Docs release documented in sources/log/.
• Started treating the documentation hub as the canonical published home for MAC product release history instead of leaving releases implicit in repo tags alone.
• Established the expectation that documented MAC product releases get version pages and grouped entries under mac-docs/log/.