Renames nvim/ → nvim.old/ (preserving init.vim + incomplete prior attempts)
and creates a fresh nvim/ with init.lua. All settings, keymaps, and plugin
declarations are converted from VimScript to Lua idioms. Plugin manager
migrated from vim-plug to lazy.nvim, which self-bootstraps on first launch.
shell-setup.sh updated to drop the vim-plug curl install; the symlink and
airline theme copy are retained (path updated for lazy's data directory).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The_miro