chore(): Reorganize modules (#7210)

**What**
Move all modules to the modules directory

packages/modules/cache-redis/README.md

@@ -0,0 +1,26 @@
+# Medusa Cache Redis
+
+Use Redis as a Medusa cache store.
+
+## Installation
+
+```
+yarn add @medusajs/cache-redis
+```
+
+## Options
+
+```
+   {
+      ttl?: number                // Time to keep data in cache (in seconds)
+    
+      redisUrl?: string           // Redis instance connection string
+    
+      redisOptions?: RedisOptions // Redis client options
+    
+      namespace?: string          // Prefix for event keys (the default is `medusa:`)
+  }
+```
+
+### Other caching modules
+- [Medusa Cache In-Memory](../cache-inmemory/README.md)