Migrate interactive tutorials (post realm v0.70)

Attempt migrating interactive tutorial again

Migrate interactive tutorial snippet syntax

Interactive tutorials: partially migrate send-xrp, no-freeze to new syntax

Fix Send XRP interactive tutorial

Interactive tutorials: fixes for Redocly incl. localization challenges

Interactive tutorials: switch defaultValue back to value in anticipation of Redocly bugfix

Fix document.ready→window.onRouteChange, cyclers, etc. in interactive
tutorials.

content/@theme/helpers.ts

@@ -51,3 +51,16 @@ export function slugify(s) {
   }
   return s;
 }
+
+export function idify(s: string) {
+  // like slugify, but more unicode-friendly.
+  // for some reason the better version using \p gives an "s12 is undefined" TypeError sometimes,
+  // so it's disabled for now. With that fixed, we could use localized step names in interactive tutorials.
+  //s = s.replace(/[^\p{Alphabetic}\p{Mark}\p{Decimal_Number}\p{Connector_Punctuation}\p{Join_Control}]/gu, '').trim().toLowerCase()
+  s = s.replace(/[^\w\s-]/gu, '').trim().toLowerCase()
+  s = s.replace(/[\s-]+/gu, '-')
+  if (!s) {
+    s = "_";
+  }
+  return s
+}