editors/emacs-devel: Update to 2026-07-18 snapshot

Upstream highlights:

• Update to Org 9.8.7
• project.el bumped to version 0.12
• Update Gnulib by running admin/merge-gnulib
• Window-management fixes such as window transpose/rotation fixes
• Eldoc fixes
• Tramp fixes

Commit log: https://github.com/emacs-mirror/emacs/compare/2adce1839db...0f086c307c1
Sponsored by: The FreeBSD Foundation