fix: use json_schema_extra instead of deprecated Field extra args (#417)

tests/tools/test_import_without_warnings.py

@@ -0,0 +1,10 @@
+import pytest
+from pydantic.warnings import PydanticDeprecatedSince20
+
+
+@pytest.mark.filterwarnings("error", category=PydanticDeprecatedSince20)
+def test_import_tools_without_pydantic_deprecation_warnings():
+    # This test is to ensure that the import of crewai_tools does not raise any Pydantic deprecation warnings.
+    import crewai_tools
+
+    assert crewai_tools