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.go

@@ -0,0 +1,22 @@
+package version
+
+var (
+	// Version is the current version of the application
+	Version = "0.1.0"
+	// GitCommit is the git commit hash
+	GitCommit = ""
+	// BuildDate is the date when the binary was built
+	BuildDate = ""
+)
+
+// GetVersion returns the complete version information
+func GetVersion() string {
+	version := Version
+	if GitCommit != "" {
+		version += " (" + GitCommit + ")"
+	}
+	if BuildDate != "" {
+		version += " built on " + BuildDate
+	}
+	return version
+}

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
+}