chore: remove remaining bun references

Swap bun for deno in the dotfiles-toolchain dev shell, drop bun from
the nvim-only tool PATH (deno is on the regular PATH via
home.packages, so Neovim inherits it), and delete the stale
npm-tools/ gitignore entry left over from the pre-Nix npm-tools setup.

Author: fredrikaverpil

.gitignore

@@ -34,6 +34,3 @@ nvim_issue
 # Applications storing files ending up in stow/
 stow/shared/.config/zed/prompts
 stow/Darwin/Library/Application Support/lazygit/state.yml
-
-# npm-tools installed packages (lockfile bun.lockb IS tracked)
-npm-tools/node_modules/

flake.nix

@@ -86,15 +86,15 @@
             # stable.${system}.xxx
 
             # Unstable packages
-            unstable.${system}.bun
+            unstable.${system}.deno
             unstable.${system}.go_latest
             unstable.${system}.nodejs
             unstable.${system}.pnpm
             unstable.${system}.python3
             unstable.${system}.ruby
           ];
           shellHook = ''
-            echo -e "\033[32m[dotfiles-toolchain] bun $(bun --version) | $(go version | awk '{print $1" "$3}') | lua $(lua -v 2>&1 | awk '{print $2}') | node $(node -v) (npm $(npm -v)) | pnpm $(pnpm -v) | python $(python --version | awk '{print $2}') | $(ruby -v | cut -d' ' -f1-2)\033[0m"
+            echo -e "\033[32m[dotfiles-toolchain] $(deno --version | awk 'NR==1{print $1" "$2}') | $(go version | awk '{print $1" "$3}') | lua $(lua -v 2>&1 | awk '{print $2}') | node $(node -v) (npm $(npm -v)) | pnpm $(pnpm -v) | python $(python --version | awk '{print $2}') | $(ruby -v | cut -d' ' -f1-2)\033[0m"
           '';
         };
       };

nix/shared/home/common.nix

@@ -216,7 +216,6 @@ in
     home.file.".config/nvim-deps-path".text = lib.makeBinPath (
       with unstable;
       [
-        bun
         cmake
         beamPackages.elixir
         gcc