net-im/gomuks-legacy: Add net-im/gomuks-legacy from old net-im/gomuks

• net-im/gomuks introduces a new design with a web and less feature rich termainl front web. Keep older version around until net-im/gomuks TUI is feature complete as this version.
• Add net-im/gomuks from 47d564d873af^ base
• Appened -legacy to binary name
• Take maintainership

PR: 292371