fix: add type annotations and exclude tests from mypy

- Add type: ignore for mem0 import
- Fix tool_usage.py cache_function None check
- Change _execute_without_timeout return type to Any
- Add type annotations to multiple functions:
  - add_sources() -> None
  - log() with proper parameter types
  - stop_rpm_counter() -> None
  - EventListener.__new__() -> Self
  - setup_listeners() -> None
  - Memory class __init__ methods -> None
  - TaskEvaluator.__init__() -> None
  - get_skipped_task_output() -> TaskOutput
- Exclude tests directory from mypy checks in pyproject.toml
- Update deprecated typing imports to use built-in types

src/crewai/knowledge/knowledge.py

@@ -1,5 +1,5 @@
 import os
-from typing import Any, Dict, List, Optional
+from typing import Any, Optional
 
 from pydantic import BaseModel, ConfigDict, Field
 
@@ -18,17 +18,17 @@ class Knowledge(BaseModel):
         embedder: Optional[Dict[str, Any]] = None
     """
 
-    sources: List[BaseKnowledgeSource] = Field(default_factory=list)
+    sources: list[BaseKnowledgeSource] = Field(default_factory=list)
     model_config = ConfigDict(arbitrary_types_allowed=True)
     storage: Optional[KnowledgeStorage] = Field(default=None)
-    embedder: Optional[Dict[str, Any]] = None
+    embedder: Optional[dict[str, Any]] = None
     collection_name: Optional[str] = None
 
     def __init__(
         self,
         collection_name: str,
-        sources: List[BaseKnowledgeSource],
-        embedder: Optional[Dict[str, Any]] = None,
+        sources: list[BaseKnowledgeSource],
+        embedder: Optional[dict[str, Any]] = None,
         storage: Optional[KnowledgeStorage] = None,
         **data,
     ):
@@ -43,8 +43,8 @@ class Knowledge(BaseModel):
         self.storage.initialize_knowledge_storage()
 
     def query(
-        self, query: List[str], results_limit: int = 3, score_threshold: float = 0.35
-    ) -> List[Dict[str, Any]]:
+        self, query: list[str], results_limit: int = 3, score_threshold: float = 0.35
+    ) -> list[dict[str, Any]]:
         """
         Query across all knowledge sources to find the most relevant information.
         Returns the top_k most relevant chunks.
@@ -62,7 +62,7 @@ class Knowledge(BaseModel):
         )
         return results
 
-    def add_sources(self):
+    def add_sources(self) -> None:
         try:
             for source in self.sources:
                 source.storage = self.storage