feat: add crewai-tools library to workspace

- Migrate crewai-tools as standalone package in lib/tools
- Configure UV workspace for monorepo structure
- Move assets to repository root
- Clean up duplicate README files
- Focus pre-commit hooks on lib/crewai/src only

lib/tools/tests/conftest.py

@@ -0,0 +1,21 @@
+from typing import Callable
+
+import pytest
+
+
+class Helpers:
+    @staticmethod
+    def get_embedding_function() -> Callable:
+        def _func(input):
+            assert input == ["What are the requirements for the task?"]
+            with open("tests/data/embedding.txt", "r") as file:
+                content = file.read()
+                numbers = content.split(",")
+                return [[float(number) for number in numbers]]
+
+        return _func
+
+
+@pytest.fixture
+def helpers():
+    return Helpers