Improve lifecycle scripts warning

[ry]

# deno install
Warning The following packages contained npm lifecycle scripts (preinstall/install/postinstall) that were not executed:
┠─ npm:@tailwindcss/oxide@4.1.11
┠─ npm:core-js@3.44.0
┃
┠─ This may cause the packages to not work correctly.
┖─ To run lifecycle scripts, use the `--allow-scripts` flag with `deno install`:
   deno install --allow-scripts=npm:@tailwindcss/oxide@4.1.11,npm:core-js@3.44.0

This is very commonly seen with Deno, and could use some love and attention to make it as clear, terse, and actionable as possible.

Related #30387