Test optional dependencies are not required in runtime (#260)

* Test optional dependencies are not required in runtime

* Add dynamic imports to S3 tools

* Setup CI

tests/test_optional_dependencies.py

@@ -0,0 +1,41 @@
+import subprocess
+import tempfile
+from pathlib import Path
+
+import pytest
+
+
+@pytest.fixture
+def temp_project():
+    temp_dir = tempfile.TemporaryDirectory()
+    project_dir = Path(temp_dir.name) / "test_project"
+    project_dir.mkdir()
+    
+    pyproject_content = f"""
+    [project]
+    name = "test-project"
+    version = "0.1.0"
+    description = "Test project"
+    requires-python = ">=3.10"
+    """
+    
+    (project_dir / "pyproject.toml").write_text(pyproject_content)
+    run_command(["uv", "add", "--editable", f"file://{Path.cwd().absolute()}"], project_dir)
+    run_command(["uv", "sync"], project_dir)
+    yield project_dir
+
+
+def run_command(cmd, cwd):
+    return subprocess.run(cmd, cwd=cwd, capture_output=True, text=True)
+
+
+def test_no_optional_dependencies_in_init(temp_project):
+    """
+    Test that crewai-tools can be imported without optional dependencies.
+
+    The package defines optional dependencies in pyproject.toml, but the base
+    package should be importable without any of these optional dependencies
+    being installed.
+    """
+    result = run_command(["uv", "run", "python", "-c", "import crewai_tools"], temp_project)
+    assert result.returncode == 0, f"Import failed with error: {result.stderr}"