- Ensures extracted strings get formatted before checking against index
- Fixes index check by switching from `git diff-index` to `git diff`,
and ensures the proper `--exit-code` flag is present (implicitly turned
on by `--quiet`)
- Adds actionable error message when the check fails
- Updates Github's actions versions from v3 to v4 (major version bump is
primarily just for default node version updates, but this way we'll get
future updates)
- Adds formatting step to npm script for extracting messages
- Runs a string extraction & format against current main
9a799cc8ab