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/cli/entry_test.go

@@ -0,0 +1,34 @@
+package cli
+
+import (
+	"testing"
+)
+
+// TestCLIEntry ensures the CLI can be imported and basic initialization works
+func TestCLIEntry(t *testing.T) {
+	// This test primarily serves as a compilation test
+	// to ensure all imports resolve correctly
+	cmd := NewRootCommand()
+	if cmd == nil {
+		t.Fatal("NewRootCommand() returned nil")
+	}
+	
+	if cmd.Use != "vaultik" {
+		t.Errorf("Expected command use to be 'vaultik', got '%s'", cmd.Use)
+	}
+	
+	// Verify all subcommands are registered
+	expectedCommands := []string{"backup", "restore", "prune", "verify", "fetch"}
+	for _, expected := range expectedCommands {
+		found := false
+		for _, cmd := range cmd.Commands() {
+			if cmd.Use == expected || cmd.Name() == expected {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Errorf("Expected command '%s' not found", expected)
+		}
+	}
+}