essentials2024.arr: provide string-{get-index,find{,-index,-opt}} from global

Author: ds26gte

src/web/arr/trove/essentials2024.arr

@@ -414,6 +414,10 @@ provide from G:
   string-from-code-point,
   string-from-code-points,
   string-index-of,
+  string-find-index,
+  string-find-opt,
+  string-find,
+  string-get-index,
   string-is-number,
   string-isnumber,
   string-length,