refactor(nvim): single source of truth for per-ft formatting width

- vim.g.dotfiles.textwidth = { sh=80, lua=120, markdown=120, gitcommit=72 }
  defined once in init.lua.
- bash/lua/markdown/gitcommit ftplugins + render-markdown read from it;
  mdformat --wrap already follows vim.bo.textwidth.
- gitcommit gets an explicit textwidth line (was implicit runtime 72).
- Behavior unchanged; one number now propagates everywhere.

0 files changed, 0 insertions, 0 deletions