feat: initial commit of Git Automation CLI

- Add comprehensive Git workflow automation tools
- Include branch management utilities
- Add commit helpers with conventional commit support
- Implement GitHub integration for PR management
- Add configuration management system
- Include comprehensive test coverage
- Add professional documentation and examples

internal/version/version_test.go

@@ -0,0 +1,53 @@
+package version
+
+import (
+	"testing"
+)
+
+func TestGetVersion(t *testing.T) {
+	// Save original values
+	originalVersion := Version
+	originalGitCommit := GitCommit
+	originalBuildDate := BuildDate
+	
+	// Reset values
+	Version = "0.1.0"
+	GitCommit = ""
+	BuildDate = ""
+	
+	// Test with just version
+	result := GetVersion()
+	expected := "0.1.0"
+	if result != expected {
+		t.Errorf("Expected '%s', got '%s'", expected, result)
+	}
+	
+	// Test with version and git commit
+	GitCommit = "abc123"
+	result = GetVersion()
+	expected = "0.1.0 (abc123)"
+	if result != expected {
+		t.Errorf("Expected '%s', got '%s'", expected, result)
+	}
+	
+	// Test with version, git commit, and build date
+	BuildDate = "2023-01-01"
+	result = GetVersion()
+	expected = "0.1.0 (abc123) built on 2023-01-01"
+	if result != expected {
+		t.Errorf("Expected '%s', got '%s'", expected, result)
+	}
+	
+	// Test with version and build date (no git commit)
+	GitCommit = ""
+	result = GetVersion()
+	expected = "0.1.0 built on 2023-01-01"
+	if result != expected {
+		t.Errorf("Expected '%s', got '%s'", expected, result)
+	}
+	
+	// Restore original values
+	Version = originalVersion
+	GitCommit = originalGitCommit
+	BuildDate = originalBuildDate
+}