Add newly open-sourced Scala REST client "escalar" (#24174)

Workday recently open-sourced our internal Scala wrapper for the Elasticsearch REST API. We plan to continue maintaining the library and use it in our products. Thought it would be a good idea to link it here in case anyone else is interested in using it!

docs/community-clients/index.asciidoc

@@ -238,16 +238,19 @@ The following projects appear to be abandoned:
 * https://github.com/sksamuel/elastic4s[elastic4s]:
   Scala DSL.
 
-* https://github.com/scalastuff/esclient[esclient]:
-  Thin Scala client.
-
 * https://github.com/gphat/wabisabi[wabisabi]:
   Asynchronous REST API Scala client.
+  
+* https://github.com/workday/escalar[escalar]:
+  Type-safe Scala wrapper for the REST API.
 
 * https://github.com/SumoLogic/elasticsearch-client[elasticsearch-client]:
   Scala DSL that uses the REST API. Akka and AWS helpers included.
 
-The following project appears to be abandoned:
+The following projects appear to be abandoned:
+
+* https://github.com/scalastuff/esclient[esclient]:
+  Thin Scala client.
 
 * https://github.com/bsadeh/scalastic[scalastic]:
   Scala client.