Add release process via goreleaser, restructure Make targets

make targets each do one thing now: lint, fmt, fmt-check, test. Use
'make check' for combined lint + fmt-check + test (the standard
pre-commit gate).

Release builds are pure-Go (CGO_ENABLED=0) cross-compiling to
linux/darwin × amd64/arm64.

Makefile

@@ -1,7 +1,7 @@
-.PHONY: test fmt lint build clean all
+.PHONY: all check test lint fmt fmt-check build clean deps test-coverage test-integration local install release release-snapshot
 
 # Version number
-VERSION := 0.0.1
+VERSION := 1.0.0-rc.1
 
 # Build variables
 GIT_REVISION := $(shell git rev-parse HEAD 2>/dev/null || echo "unknown")
@@ -13,8 +13,11 @@ LDFLAGS := -X 'git.eeqj.de/sneak/vaultik/internal/globals.Version=$(VERSION)' \
 # Default target
 all: vaultik
 
-# Run tests
-test: lint fmt-check
+# Combined pre-commit/CI gate: lint, format check, then tests.
+check: lint fmt-check test
+
+# Run tests only.
+test:
 	@echo "Running tests..."
 	@if ! go test -v -timeout 10s ./... 2>&1; then \
 		echo ""; \
@@ -23,41 +26,41 @@ test: lint fmt-check
 		exit 1; \
 	fi
 
-# Check if code is formatted
+# Check if code is formatted.
 fmt-check:
 	@if [ -n "$$(go fmt ./...)" ]; then \
 		echo "Error: Code is not formatted. Run 'make fmt' to fix."; \
 		exit 1; \
 	fi
 
-# Format code
+# Format code.
 fmt:
 	go fmt ./...
 
-# Run linter
+# Run linter only.
 lint:
 	golangci-lint run
 
-# Build binary
+# Build binary.
 vaultik: internal/*/*.go cmd/vaultik/*.go
 	go build -ldflags "$(LDFLAGS)" -o $@ ./cmd/vaultik
 
-# Clean build artifacts
+# Clean build artifacts.
 clean:
 	rm -f vaultik
 	go clean
 
-# Install dependencies
+# Install dependencies.
 deps:
 	go mod download
 	go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
 
-# Run tests with coverage
+# Run tests with coverage.
 test-coverage:
 	go test -v -coverprofile=coverage.out ./...
 	go tool cover -html=coverage.out -o coverage.html
 
-# Run integration tests
+# Run integration tests.
 test-integration:
 	go test -v -tags=integration ./...
 
@@ -67,3 +70,11 @@ local:
 
 install: vaultik
 	cp ./vaultik $(HOME)/bin/
+
+# Build and publish release artifacts (linux/darwin × amd64/arm64) via goreleaser.
+release:
+	goreleaser release --clean
+
+# Dry-run a release build without publishing or tagging.
+release-snapshot:
+	goreleaser release --clean --snapshot