feat(scripts): automate tool and AUR package installation setup

.chezmoiscripts/run_onchange_after_40-post.sh.tmpl

@@ -7,12 +7,3 @@ if command -v bat >/dev/null 2>&1; then bat cache --build >/dev/null || true; fi
 {{ if eq .chezmoi.os "linux" -}}
 if command -v fc-cache >/dev/null 2>&1; then fc-cache -f >/dev/null || true; fi
 {{ end -}}
-
-# cargo installs from packages.shared.cargo; skipped when cargo is absent.
-# cargo hash: {{ .packages.shared.cargo | toJson | sha256sum }}
-if command -v cargo >/dev/null 2>&1; then
-    installed=$(cargo install --list | awk '/^[^ ]/{print $1}')
-{{ range .packages.shared.cargo }}
-    echo "$installed" | grep -qx "{{ . }}" || cargo install --locked "{{ . }}"
-{{ end }}
-fi