Switch the JS scripts used for generating StackBlitz projects and zips
from CommonJS to ESM format. This is necessary for upgrading the
`globby` dependency to [version 12.0.0][1] in a subsequent commit.
[1]: https://github.com/sindresorhus/globby/releases/v12.0.0
PR Close#42921
This commit updates the Markdown files inside the `aio/tools/` directory
to contain one sentence per line in order to be consistent with how
Markdown files are formatted in the rest of the repo.
PR Close#38992
