chore(config): clean up and reorganize configuration files

dot_config/fish/functions/fish_user_key_bindings.fish

@@ -16,6 +16,7 @@ function fish_user_key_bindings
         # prompt back in place (or below any output) afterwards. ctrl-a:
         # omp-session resumes or starts omp for the repo (same in zsh); when it
         # opens the omp-sessions cable and it is cancelled, it steps back up.
+        # ctrl-n: always a new omp session.
         bind -M $mode ctrl-e '_tv_inline git-files; commandline -f repaint'
         bind -M $mode ctrl-b purple repaint
         bind -M $mode ctrl-y clip-last
@@ -23,6 +24,7 @@ function fish_user_key_bindings
         bind -M $mode ctrl-o _gho_bind
         bind -M $mode ctrl-p _pj_bind
         bind -M $mode ctrl-a 'omp-session; commandline -f repaint'
+        bind -M $mode ctrl-n 'omp; commandline -f repaint'
         bind -M $mode ctrl-w 'atuin ai inline; commandline -f repaint'
         # ctrl-z at the prompt: fg the only background job, or pick one from
         # the jobs tv cable when there are several (_jobs_bind).