feat(darwin)!: update config

Add `nix` initialization script to shell's `extraConfig`
  - fixes `nix` when updating MacOS
Add `flameshot` to `brew` packages
Fix tilde (`~`) remapping
  - mysteriously switched after a restart, needed to swap
Add (noncompiling) `borders` (`JankyBorders`) config
Add `TODO` to `sketchybar` config

modules/home-manager/reo101-shell/default.nix

@@ -273,6 +273,12 @@ in
               # (optionalString cfg.zoxide ''
               #   eval "$(${pkgs.zoxide}/bin/zoxide init zsh)"
               # '')
+              ''
+                # Prevent macOS updates from destroying nix
+                if [ -e "/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh" ]; then
+                  source "/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh"
+                fi
+              ''
               # cfg.extraConfig
             ];