Move to src dir usage (#99)

src/crewai/agents/cache/__init__.py

@@ -0,0 +1,2 @@
+from .cache_handler import CacheHandler
+from .cache_hit import CacheHit

src/crewai/agents/cache/cache_handler.py

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+from typing import Optional
+
+from pydantic import PrivateAttr
+
+
+class CacheHandler:
+    """Callback handler for tool usage."""
+
+    _cache: PrivateAttr = {}
+
+    def __init__(self):
+        self._cache = {}
+
+    def add(self, tool, input, output):
+        input = input.strip()
+        self._cache[f"{tool}-{input}"] = output
+
+    def read(self, tool, input) -> Optional[str]:
+        input = input.strip()
+        return self._cache.get(f"{tool}-{input}")

src/crewai/agents/cache/cache_hit.py

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+from typing import Any
+
+from pydantic import BaseModel, Field
+
+from .cache_handler import CacheHandler
+
+
+class CacheHit(BaseModel):
+    """Cache Hit Object."""
+
+    class Config:
+        arbitrary_types_allowed = True
+
+    # Making it Any instead of AgentAction to avoind
+    # pydantic v1 vs v2 incompatibility, langchain should
+    # soon be updated to pydantic v2
+    action: Any = Field(description="Action taken")
+    cache: CacheHandler = Field(description="Cache Handler for the tool")