Fix Python 3.13 compatibility (issue #2794)

- Update Python version constraint from '>=3.10,<3.13' to '>=3.10,<3.14' in all relevant files
- Add test to verify Python version compatibility
- Update GitHub Actions workflow to include Python 3.13 testing
- Add Docker test to verify installation on Python 3.13

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/test_python_compatibility.py

@@ -0,0 +1,18 @@
+"""Tests for Python version compatibility."""
+import sys
+import pytest
+
+
+def test_python_version_compatibility():
+    """Test that the package supports the current Python version."""
+    # This test will fail if the package doesn't support the current Python version
+    import crewai
+    
+    # Print the Python version for debugging
+    print(f"Python version: {sys.version}")
+    
+    # Print the crewai version for debugging
+    print(f"CrewAI version: {crewai.__version__}")
+    
+    # If we got here, the import worked, which means the package supports this Python version
+    assert True