Add test and script to ensure 1:1 parity of liquid tags between source and translation (#22472)

Co-authored-by: Peter Bengtsson <peterbe@github.com>

script/i18n/reset-files-with-broken-liquid-tags.js

@@ -0,0 +1,56 @@
+#!/usr/bin/env node
+
+import program from 'commander'
+import { languageFiles, compareLiquidTags } from '../../lib/liquid-tags/tokens.js'
+import languages from '../../lib/languages.js'
+import fs from 'fs'
+
+program
+  .description('show-liquid-tags-diff')
+  .requiredOption('-l, --language <language>', 'The language to compare')
+  .option('-d, --dry-run', 'Just pretend to reset files')
+  .parse(process.argv)
+
+function resetFiles(files) {
+  console.log(`Files to be reset (${files.length}): \n${files.join('\n')}`)
+
+  files.forEach((file) => {
+    // remove file so it falls back to English
+    console.log(`removing ${file}`)
+
+    if (!program.opts().dryRun) {
+      fs.unlinkSync(file)
+    }
+  })
+}
+
+async function main() {
+  const options = program.opts()
+  const language = languages[options.language]
+
+  if (!language) {
+    throw new Error(`Language ${options.language} not found`)
+  }
+
+  const files = languageFiles(language, 'content')
+  const brokenFiles = []
+
+  files.forEach((file) => {
+    try {
+      // it throws error if the the syntax is invalid
+      const comparison = compareLiquidTags(file, language)
+
+      if (comparison.diff.count === 0) {
+        return
+      }
+
+      brokenFiles.push(comparison.translation)
+    } catch (e) {
+      brokenFiles.push(e.filePath)
+    }
+  })
+
+  await resetFiles(brokenFiles)
+}
+
+main()