add linters

We need to add linters for all packages and sub-packages.

Start by inventorying the packages and sub-packages in create-hyperweb-app and checking their existing configuration conventions. Determine how linting should cover each package and how the repository should run it across all of them; the issue names no files or tests, so the entry points and completion checks must be established first.

索引モデルが issue の本文から書いたものです。