(refactor) - caching use separate files for each cache class (#6251)

* fix remove qdrant semantic caching to it's own folder

* refactor use 1 file for s3 caching

* fix use sep files for in mem and redis caching

* fix refactor caching

* add readme.md for caching folder

litellm/caching/base_cache.py

@@ -0,0 +1,29 @@
+"""
+Base Cache implementation. All cache implementations should inherit from this class.
+
+Has 4 methods:
+    - set_cache
+    - get_cache
+    - async_set_cache
+    - async_get_cache
+"""
+
+
+class BaseCache:
+    def set_cache(self, key, value, **kwargs):
+        raise NotImplementedError
+
+    async def async_set_cache(self, key, value, **kwargs):
+        raise NotImplementedError
+
+    def get_cache(self, key, **kwargs):
+        raise NotImplementedError
+
+    async def async_get_cache(self, key, **kwargs):
+        raise NotImplementedError
+
+    async def batch_cache_write(self, result, *args, **kwargs):
+        raise NotImplementedError
+
+    async def disconnect(self):
+        raise NotImplementedError