wip/nextvi 7.0 NetBSD

Nextvi is a modern clone of the command-line text editor vi(1), initially developed by Bill Joy in 1976 for Unix-based systems. Nextvi builds upon many standard features from vi(1) including a unique modal interface that allows users to switch between normal, insert, and command modes for efficient text manipulation. Additional enhancements include an unrestricted macro system, syntax highlighting, keymaps, bidirectional UTF-8 support, and numerous other features. Nextvi remains highly efficient, portable, and hackable, ensuring its continued relevance and high quality for years to come.