Add redis-client and redis-cluster-client to Ruby clients

clients/ruby/github.com/redis-rb/redis-client.json

@@ -0,0 +1,4 @@
+{
+    "name": "redis-client",
+    "description": "Simple low level client for Redis 6+"
+}

clients/ruby/github.com/redis-rb/redis-cluster-client.json

@@ -0,0 +1,4 @@
+{
+    "name": "redis-cluster-client",
+    "description": "A simple client for Redis 6+ cluster"
+}

clients/ruby/github.com/redis/redis-clustering.json

@@ -0,0 +1,4 @@
+{
+    "name": "redis-clustering",
+    "description": "A Ruby client that tries to match Redis' Cluster API one-to-one, while still providing an idiomatic interface."
+}