Add basic tests to fix pytest exit code 5 CI failure

Co-authored-by: Stalin-143 <161853795+Stalin-143@users.noreply.github.com>

tests/__init__.py

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+# Test package for keylogger-educational

tests/test_basic.py

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+"""
+Basic tests for the keylogger-educational project.
+These tests verify the basic project structure and configuration.
+"""
+
+import os
+import pytest
+
+
+@pytest.fixture
+def project_root():
+    """Return the project root directory path."""
+    return os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+
+def test_project_structure(project_root):
+    """Test that the project has expected structure."""
+    # Check essential files exist
+    assert os.path.exists(os.path.join(project_root, 'pyproject.toml'))
+    assert os.path.exists(os.path.join(project_root, 'README.md'))
+    assert os.path.exists(os.path.join(project_root, 'src'))
+
+
+def test_src_package_structure(project_root):
+    """Test that the src package has expected files."""
+    src_dir = os.path.join(project_root, 'src')
+    
+    assert os.path.exists(os.path.join(src_dir, '__init__.py'))
+    assert os.path.exists(os.path.join(src_dir, 'keylogger.py'))
+    assert os.path.exists(os.path.join(src_dir, 'server.py'))
+
+
+def test_config_directory_exists(project_root):
+    """Test that the config directory exists."""
+    assert os.path.exists(os.path.join(project_root, 'config'))
+
+
+def test_version_file_exists(project_root):
+    """Test that VERSION file exists and contains valid version."""
+    version_file = os.path.join(project_root, 'VERSION')
+    
+    assert os.path.exists(version_file)
+    
+    with open(version_file, 'r') as f:
+        version = f.read().strip()
+    
+    # Check version is not empty
+    assert len(version) > 0