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.go

@@ -0,0 +1,13 @@
+package cli
+
+import (
+	"os"
+)
+
+// CLIEntry is the main entry point for the CLI application
+func CLIEntry() {
+	rootCmd := NewRootCommand()
+	if err := rootCmd.Execute(); err != nil {
+		os.Exit(1)
+	}
+}