x11/rofi: update 0.15.7 -> 0.15.11

• Update PORTVERSION, PLIST_FILES, SHEBANG_FILES, and distinfo 0.15.11
• LIB_DEPENDS: Add x11/startup-notification
• USES: Sort and add shebangfix
• Add I3 support option

PR: 204675
Submitted by: nomoo@nomoo.ru (maintainer) (with several changes)