net-im/gomuks: Add missing terminal binary and front/backend web parts

• Update to 26.06 (v0.2606.0)
• Build gomuks-terminal (TUI frontend). This version of the TUI is not as feature rich as the previous version should be added back via net-im/gomuks-legacy until feature complete.
• Build gomuks web frontend and backend via USES=electron:env to fetch npm bits via upstream package.json adding @swc/core-freebsd-x64
• Take maintainership

Changelog: https://github.com/gomuks/gomuks/blob/main/CHANGELOG.md#v2606

PR: 292010