[discuss] Suffix all bash scripts with .sh

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Use .sh or .bash extension if file is meant to be included/sourced. Never on executable script.

I'm curious about the philosophy of NOT including .sh as a suffix for scripts.

The main reason I always suffix shell scripts with .sh is to make shellcheck linting simpler. A makefile rule with find . -type f -name '*.sh' | xargs shellcheck is the simplest way I know to ensure quality control for all scripts in a repo.