Implement CLI skeleton with cobra and fx dependency injection

- Set up cobra CLI with all commands (backup, restore, prune, verify, fetch)
- Integrate uber/fx for dependency injection and lifecycle management
- Add globals package with build-time variables (Version, Commit)
- Implement config loading from YAML with validation
- Create core data models (FileInfo, ChunkInfo, BlobInfo, Snapshot)
- Add Makefile with build, test, lint, and clean targets
- Include minimal test suite for compilation verification
- Update documentation with --quick flag for verify command
- Fix markdown numbering in implementation TODO

internal/globals/globals.go

@@ -0,0 +1,39 @@
+package globals
+
+import (
+	"context"
+	"time"
+
+	"go.uber.org/fx"
+)
+
+// these get populated from main() and copied into the Globals object.
+var (
+	Appname string = "vaultik"
+	Version string = "dev"
+	Commit  string = "unknown"
+)
+
+type Globals struct {
+	Appname   string
+	Version   string
+	Commit    string
+	StartTime time.Time
+}
+
+func New(lc fx.Lifecycle) (*Globals, error) {
+	n := &Globals{
+		Appname: Appname,
+		Version: Version,
+		Commit:  Commit,
+	}
+	
+	lc.Append(fx.Hook{
+		OnStart: func(ctx context.Context) error {
+			n.StartTime = time.Now()
+			return nil
+		},
+	})
+	
+	return n, nil
+}

internal/globals/globals_test.go

@@ -0,0 +1,36 @@
+package globals
+
+import (
+	"testing"
+	
+	"go.uber.org/fx"
+	"go.uber.org/fx/fxtest"
+)
+
+// TestGlobalsNew ensures the globals package initializes correctly
+func TestGlobalsNew(t *testing.T) {
+	app := fxtest.New(t,
+		fx.Provide(New),
+		fx.Invoke(func(g *Globals) {
+			if g == nil {
+				t.Fatal("Globals instance is nil")
+			}
+			
+			if g.Appname != "vaultik" {
+				t.Errorf("Expected Appname to be 'vaultik', got '%s'", g.Appname)
+			}
+			
+			// Version and Commit will be "dev" and "unknown" by default
+			if g.Version == "" {
+				t.Error("Version should not be empty")
+			}
+			
+			if g.Commit == "" {
+				t.Error("Commit should not be empty")
+			}
+		}),
+	)
+	
+	app.RequireStart()
+	app.RequireStop()
+}