Coexist with a desktop that already manages its tools (Omarchy)

On an Omarchy laptop bootstrap left two of almost everything: VS Code from
both pacman and the tarball (two menu entries, one shared ~/.config/Code
profile), and kubectl/helm/k9s/kubectx/yq/jq/node/ansible in ~/.local/bin
behind mise and pacman copies that always won on PATH. The zsh helpers
(op*, grmb, secrets.env) also never reached the bash login shell.

- lib/fetch.sh: add `shadowed`, true when another copy of a tool comes
  earlier on PATH than ~/.local/bin. Always false where zshrc puts
  ~/.local/bin first, so VM installs are unchanged.
- bin/, node/, ansible/: skip tools that are shadowed.
- vscode/: defer to any system `code`, and remove a tarball copy this
  module installed earlier.
- bash/: new module; bash port of the zshrc helpers, sourced from
  ~/.bashrc via a marked block. No-ops without ~/.bashrc.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

node/install.sh

@@ -29,6 +29,13 @@ PREFIX="$HOME/.local/opt/node"
 BIN_DIR="$HOME/.local/bin"
 NODE_CLIS="node npm npx"
 
+# Another node (mise, nvm, a distro package) already wins on PATH, so ours
+# would never run -- see `shadowed` in lib/fetch.sh. npx comes with it.
+if _winner="$(shadowed node)"; then
+  say "node: $_winner comes first on PATH; skipping (a copy in $BIN_DIR would never run)."
+  exit 0
+fi
+
 case "$(fetch_arch)" in
   x86_64)  NODE_ARCH=x64 ;;
   aarch64) NODE_ARCH=arm64 ;;