Initial commit: Azure DevOps TUI client

A terminal-based user interface for browsing and managing Azure DevOps
work items. Features include:

- Browse work items with filtering by area, iteration, state, and type
- View work item details with markdown rendering
- Open work items in browser
- Create git branches from work items
- Update work item state
- Keyboard-driven navigation

🤖 Generated with [Claude Code](https://claude.ai/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

cmd/root.go

@@ -0,0 +1,44 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/samuelenocsson/devops-tui/internal/api"
+	"github.com/samuelenocsson/devops-tui/internal/config"
+	"github.com/samuelenocsson/devops-tui/internal/ui"
+)
+
+// Execute runs the application
+func Execute() error {
+	// Load configuration
+	cfg, err := config.Load()
+	if err != nil {
+		// If config not found, try to create default
+		if err := config.CreateDefaultConfig(); err == nil {
+			fmt.Println("Created default config file at ~/.config/devops-tui/config.yaml")
+			fmt.Println("Please edit the config file with your Azure DevOps settings.")
+			os.Exit(0)
+		}
+		return fmt.Errorf("configuration error: %w", err)
+	}
+
+	// Create API client
+	client := api.NewClient(cfg)
+
+	// Create and run the TUI
+	app := ui.NewApp(client)
+
+	p := tea.NewProgram(
+		app,
+		tea.WithAltScreen(),
+		tea.WithMouseCellMotion(),
+	)
+
+	if _, err := p.Run(); err != nil {
+		return fmt.Errorf("error running application: %w", err)
+	}
+
+	return nil
+}