Homebrew 7.0 debuts BrewUI, Landlock sandboxing

Homebrew is aggressively trimming technical debt and phasing out legacy platforms to build a faster, sandboxed, and more secure package management ecosystem.

• –Demoting Intel x86_64 Macs to Tier 3 and setting an end-of-life date for September 2027 reflects the reality of open-source volunteer maintenance following Apple and GitHub's departure from Intel CI runners.
• –Switching to Landlock for Linux sandboxing eliminates cumbersome Bubblewrap and Docker permission friction, offering seamless unprivileged containment.
• –Deprecating arbitrary Ruby execution in `post_install` and cask flight hooks in favor of declarative `*_steps` significantly hardens the supply chain against malicious taps and simplifies sandboxing.
• –BrewUI bridges the gap for non-technical users while reinforcing terminal fluency by surfacing the underlying CLI commands for every UI action.
• –Direct integration of OSV.dev vulnerability auditing (`brew vulns`) bakes package-level security triage into standard developer environments without external taps.