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

Makefile

@@ -0,0 +1,47 @@
+.PHONY: test fmt lint build clean all
+
+# Build variables
+VERSION := $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
+COMMIT := $(shell git rev-parse HEAD 2>/dev/null || echo "unknown")
+
+# Linker flags
+LDFLAGS := -X 'git.eeqj.de/sneak/vaultik/internal/globals.Version=$(VERSION)' \
+           -X 'git.eeqj.de/sneak/vaultik/internal/globals.Commit=$(COMMIT)'
+
+# Default target
+all: test
+
+# Run tests
+test: lint
+	go test -v ./...
+
+# Format code
+fmt:
+	go fmt ./...
+
+# Run linter
+lint:
+	golangci-lint run
+
+# Build binary
+build:
+	go build -ldflags "$(LDFLAGS)" -o vaultik ./cmd/vaultik
+
+# Clean build artifacts
+clean:
+	rm -f vaultik
+	go clean
+
+# Install dependencies
+deps:
+	go mod download
+	go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
+
+# Run tests with coverage
+test-coverage:
+	go test -v -coverprofile=coverage.out ./...
+	go tool cover -html=coverage.out -o coverage.html
+
+# Run integration tests
+test-integration:
+	go test -v -tags=integration ./...