v3.0.0 — first-party Hugo theme and company standards

Brand moved to its first-party Hugo theme and adopted company standards.

Highlights#

• Migrated the documentation renderer from Docsy to the first-party projectious.work Hugo theme.
• Added locally reviewable company engineering standards and the Brand application profile.
• Published a generated machine-readable brand manifest and offline, read-only MCP contract.

See the repository change log for the complete notes and migration details.