ESLint update (#1855)

- Emit error when doing things like `const translate =
Scratch.translate;` because the build script won't realize you are
translating strings.
- Emit error when extension name is not translated and fix a couple
instances of this
- Emit error when block text is not translated and fix a couple
instances of this
- Refactor ESLint rules to be many separate rules instead of
no-restricted-syntax being very big
- Include eslint.config.js in prettier

.prettierignore

@@ -2,7 +2,6 @@ build
 images
 licenses
 website
-eslint.config.js
 *.json
 *.yml
 *.md