Adds initial gitlocal CLI and core functionality

Introduces the `gitlocal` command-line tool for managing nested Git repositories.

Includes the following main commands:
- `convert`: Renames `.git` to `.gitlocal`, allowing a parent repository to ignore the converted child repository. Supports recursive scanning and dry-run options. Tracks converted repositories in a global configuration.
- `revert`: Restores `.gitlocal` to `.git`. Includes an option to revert all tracked repositories.
- `status`: Displays a list of all repositories currently tracked by `gitlocal`, showing their path, conversion time, and original remote/branch.

Establishes internal modules for Git operations, configuration management, and recursive repository scanning.
Adds a comprehensive test suite covering core command logic and utility functions.
Initializes Go module and basic project `.gitignore`.

cmd/status.go

@@ -0,0 +1,84 @@
+package cmd
+
+import (
+	"fmt"
+	"time"
+
+	"git.membo.co.uk/dtomlinson/gitlocal/internal/config"
+	"github.com/spf13/cobra"
+)
+
+var statusCmd = &cobra.Command{
+	Use:   "status",
+	Short: "Show all converted repositories",
+	Long:  `Display a list of all repositories that have been converted from .git to .gitlocal.`,
+	RunE:  runStatus,
+}
+
+func runStatus(cmd *cobra.Command, args []string) error {
+	cfg, err := config.Load()
+	if err != nil {
+		return fmt.Errorf("failed to load config: %w", err)
+	}
+
+	if len(cfg.Repos) == 0 {
+		fmt.Println("No converted repositories")
+		return nil
+	}
+
+	fmt.Printf("Converted Repositories (%d):\n\n", len(cfg.Repos))
+
+	for _, repo := range cfg.Repos {
+		fmt.Printf("  %s\n", repo.Path)
+		fmt.Printf("    Converted: %s\n", formatTime(repo.ConvertedAt))
+		if repo.OriginalRemote != "" {
+			fmt.Printf("    Remote: %s\n", repo.OriginalRemote)
+		}
+		if repo.OriginalBranch != "" {
+			fmt.Printf("    Branch: %s\n", repo.OriginalBranch)
+		}
+		fmt.Println()
+	}
+
+	return nil
+}
+
+func formatTime(t time.Time) string {
+	now := time.Now()
+	diff := now.Sub(t)
+
+	switch {
+	case diff < time.Minute:
+		return "just now"
+	case diff < time.Hour:
+		mins := int(diff.Minutes())
+		if mins == 1 {
+			return "1 minute ago"
+		}
+		return fmt.Sprintf("%d minutes ago", mins)
+	case diff < 24*time.Hour:
+		hours := int(diff.Hours())
+		if hours == 1 {
+			return "1 hour ago"
+		}
+		return fmt.Sprintf("%d hours ago", hours)
+	case diff < 7*24*time.Hour:
+		days := int(diff.Hours() / 24)
+		if days == 1 {
+			return "1 day ago"
+		}
+		return fmt.Sprintf("%d days ago", days)
+	case diff < 30*24*time.Hour:
+		weeks := int(diff.Hours() / 24 / 7)
+		if weeks == 1 {
+			return "1 week ago"
+		}
+		return fmt.Sprintf("%d weeks ago", weeks)
+	default:
+		months := int(diff.Hours() / 24 / 30)
+		if months == 1 {
+			return "1 month ago"
+		}
+		return fmt.Sprintf("%d months ago", months)
+	}
+}