chore: Move i18n generation, pre-commit hooks (#3410)

lint-staged.config.mjs

@@ -0,0 +1,12 @@
+export default {
+  // Efficiently run prettier and translation updates on changes to JS and
+  // TypeScript files
+  "**/*.[tj]s?(x)": [
+    (f) => (f.length > 20 ? `yarn lint --fix` : `eslint ${f.join(" ")} --fix`),
+    () => `yarn build:i18n`,
+    () => "git add shared/i18n/locales/en_US/translation.json",
+  ],
+
+  // Automatically de-duplicate packages as yarn is terrible at it
+  "(yarn.lock|package.json)": () => `yarn yarn-deduplicate yarn.lock`,
+};