feat: add mypy as type checker, update code and add comment to reference (#591)

* fix: fix test actually running

* fix: fix test to not send request to openai

* fix: fix linting to remove cli files

* fix: exclude only files that breaks black

* fix: Fix all Ruff checkings on the code and Fix Test with repeated name

* fix: Change linter name on yml file

* feat: update pre-commit

* feat: remove need for isort on the code

* feat: add mypy as type checker, update code and add comment to reference

* feat: remove black linter

* feat: remove poetry to run the command

* feat: change logic to test mypy

* feat: update tests yml to try to fix the tests gh action

* feat: try to add just mypy to run on gh action

* feat: fix yml file

* feat: add comment to avoid issue on gh action

* feat: decouple pytest from the necessity of poetry install

* feat: change tests.yml to test different approach

* feat: change to poetry run

* fix: parameter field on yml file

* fix: update parameters to be on the pyproject

* fix: update pyproject to remove import untyped errors

src/crewai/agents/tools_handler.py

@@ -8,13 +8,13 @@ from .cache.cache_handler import CacheHandler
 class ToolsHandler:
     """Callback handler for tool usage."""
 
-    last_used_tool: ToolCalling = {}
-    cache: CacheHandler
+    last_used_tool: ToolCalling = {}  # type: ignore # BUG?: Incompatible types in assignment (expression has type "Dict[...]", variable has type "ToolCalling")
+    cache: Optional[CacheHandler]
 
     def __init__(self, cache: Optional[CacheHandler] = None):
         """Initialize the callback handler."""
         self.cache = cache
-        self.last_used_tool = {}
+        self.last_used_tool = {}  # type: ignore # BUG?: same as above
 
     def on_tool_use(
         self,
@@ -23,7 +23,7 @@ class ToolsHandler:
         should_cache: bool = True,
     ) -> Any:
         """Run when tool ends running."""
-        self.last_used_tool = calling
+        self.last_used_tool = calling  # type: ignore # BUG?: Incompatible types in assignment (expression has type "Union[ToolCalling, InstructorToolCalling]", variable has type "ToolCalling")
         if self.cache and should_cache and calling.tool_name != CacheTools().name:
             self.cache.add(
                 tool=calling.tool_name,