feat: improve resource routing API and add comprehensive quality standards

BREAKING CHANGES:
- Renamed HandleGET -> MemberGET for member-level routes
- Renamed HandlePOST -> MemberPOST for member-level routes
- Renamed HandlePUT -> MemberPUT for member-level routes
- Renamed HandlePATCH -> MemberPATCH for member-level routes
- Renamed HandleDELETE -> MemberDELETE for member-level routes

New Features:
- Added collection-level route methods: GET, POST, PUT, PATCH, DELETE
- Clear distinction between collection (/pattern/action) and member (/pattern/{id}/action) routes
- Comprehensive documentation (README, CONTRIBUTING, QUICKSTART, DOCS)
- Development tooling (Makefile, check.sh script)
- AI coding assistant guidelines (.cursorrules)
- GitHub Actions CI/CD pipeline
- golangci-lint configuration

Code Quality:
- Optimized struct field alignment for better memory usage
- All code passes go vet, staticcheck, and fieldalignment
- All tests pass with race detector
- Go 1.25+ requirement enforced

Documentation:
- Complete README rewrite with examples
- CONTRIBUTING.md with development guidelines
- QUICKSTART.md for new users
- CHANGELOG.md with version history
- SUMMARY.md documenting all changes
- DOCS.md as documentation index

Makefile

@@ -0,0 +1,128 @@
+.PHONY: help test vet staticcheck fieldalignment check coverage bench clean install-tools fmt tidy run-example
+
+# Default target
+help:
+	@echo "Mux - Development Commands"
+	@echo ""
+	@echo "Usage: make [target]"
+	@echo ""
+	@echo "Targets:"
+	@echo "  help           Show this help message"
+	@echo "  test           Run tests"
+	@echo "  test-race      Run tests with race detector"
+	@echo "  vet            Run go vet"
+	@echo "  staticcheck    Run staticcheck"
+	@echo "  fieldalignment Check and report field alignment issues"
+	@echo "  fieldalignment-fix Automatically fix field alignment issues"
+	@echo "  check          Run all quality checks (vet, staticcheck, fieldalignment, tests)"
+	@echo "  coverage       Generate test coverage report"
+	@echo "  coverage-html  Generate and open HTML coverage report"
+	@echo "  bench          Run benchmarks"
+	@echo "  fmt            Format code with gofmt"
+	@echo "  tidy           Tidy and verify go.mod"
+	@echo "  clean          Clean build artifacts and caches"
+	@echo "  install-tools  Install required development tools"
+	@echo "  run-example    Run the example server"
+	@echo ""
+
+# Install development tools
+install-tools:
+	@echo "Installing development tools..."
+	go install honnef.co/go/tools/cmd/staticcheck@latest
+	go install golang.org/x/tools/go/analysis/passes/fieldalignment/cmd/fieldalignment@latest
+	@echo "Tools installed successfully!"
+
+# Run tests
+test:
+	@echo "Running tests..."
+	go test -v ./...
+
+# Run tests with race detector
+test-race:
+	@echo "Running tests with race detector..."
+	go test -v -race ./...
+
+# Run go vet
+vet:
+	@echo "Running go vet..."
+	go vet ./...
+
+# Run staticcheck
+staticcheck:
+	@echo "Running staticcheck..."
+	@command -v staticcheck >/dev/null 2>&1 || { echo "staticcheck not found. Run 'make install-tools'"; exit 1; }
+	staticcheck ./...
+
+# Check field alignment
+fieldalignment:
+	@echo "Checking field alignment..."
+	@command -v fieldalignment >/dev/null 2>&1 || { echo "fieldalignment not found. Run 'make install-tools'"; exit 1; }
+	@fieldalignment ./... 2>&1 | tee /tmp/fieldalignment.txt || true
+	@if grep -q ":" /tmp/fieldalignment.txt; then \
+		echo ""; \
+		echo "⚠️  Field alignment issues found."; \
+		echo "Run 'make fieldalignment-fix' to automatically fix them."; \
+		exit 1; \
+	else \
+		echo "✅ No field alignment issues found."; \
+	fi
+
+# Fix field alignment issues
+fieldalignment-fix:
+	@echo "Fixing field alignment issues..."
+	@command -v fieldalignment >/dev/null 2>&1 || { echo "fieldalignment not found. Run 'make install-tools'"; exit 1; }
+	fieldalignment -fix ./...
+	@echo "Field alignment issues fixed!"
+
+# Run all quality checks
+check: vet staticcheck test-race
+	@echo ""
+	@echo "✅ All checks passed!"
+
+# Generate test coverage
+coverage:
+	@echo "Generating coverage report..."
+	go test -coverprofile=coverage.out -covermode=atomic ./...
+	go tool cover -func=coverage.out
+	@echo ""
+	@echo "Total coverage:"
+	@go tool cover -func=coverage.out | grep total | awk '{print $$3}'
+
+# Generate HTML coverage report
+coverage-html: coverage
+	@echo "Generating HTML coverage report..."
+	go tool cover -html=coverage.out -o coverage.html
+	@echo "Opening coverage report in browser..."
+	@command -v open >/dev/null 2>&1 && open coverage.html || \
+	command -v xdg-open >/dev/null 2>&1 && xdg-open coverage.html || \
+	echo "Please open coverage.html in your browser"
+
+# Run benchmarks
+bench:
+	@echo "Running benchmarks..."
+	go test -bench=. -benchmem ./... -run=^#
+
+# Format code
+fmt:
+	@echo "Formatting code..."
+	gofmt -s -w .
+	@echo "Code formatted!"
+
+# Tidy go.mod
+tidy:
+	@echo "Tidying go.mod..."
+	go mod tidy
+	go mod verify
+	@echo "go.mod tidied!"
+
+# Clean build artifacts
+clean:
+	@echo "Cleaning build artifacts..."
+	go clean -cache -testcache -modcache
+	rm -f coverage.out coverage.html
+	@echo "Clean complete!"
+
+# Run example server
+run-example:
+	@echo "Starting example server..."
+	cd example && go run main.go