DOC-3547: gather Java clients under Java 'folder' (#2700)

Author: dwdougherty

docs/connect/clients/java/_index.md

@@ -0,0 +1,11 @@
+---
+title: "Connect with Redis Java clients"
+linkTitle: "Java clients"
+description: Connect your application to a Redis database using Java and try an example
+weight: 3
+---
+
+You have two choices of Java clients that you can use with Redis:
+
+- Jedis, for synchronous applications.
+- Lettuce, for asynchronous and reactive applications.

docs/connect/clients/java.md renamed to docs/connect/clients/java/java.md

@@ -2,7 +2,7 @@
 title: "Java guide"
 linkTitle: "Java"
 description: Connect your Java application to a Redis database
-weight: 3
+weight: 1
 aliases:
   - /docs/clients/java/
   - /docs/redis-clients/java/

docs/connect/clients/lettuce.md renamed to docs/connect/clients/java/lettuce.md

@@ -2,7 +2,7 @@
 title: "Lettuce guide"
 linkTitle: "Lettuce"
 description: Connect your Lettuce application to a Redis database
-weight: 3
+weight: 2
 ---
 
 Install Redis and the Redis client, then connect your Lettuce application to a Redis database.