Updated MAC Core plugin

Property	Value
description	Updated MAC Core in the Bricks base starter from `0.8.0` to `1.0.0`.
stack	Bricks
variant	base
version	1.0.0
type	Update
related	MAC Core, MAC Core, Added content-model plugins

• Updated MAC Core from 0.8.0 to 1.0.0 in the Bricks base starter plugin stack.
• Replaced the earlier pre-1.0.0 plugin build used during baseline assembly with the 1.0.0 release.
• Kept MAC Core as the required shared project-core plugin in the starter.