feat: scaffold Go project with cobra CLI, Makefile, and config

Set up the Go module, directory structure, and minimal CLI entrypoint
for the awesome-docker Go rewrite. Includes:
- cobra-based CLI with version command
- Makefile with build/test/lint/check/health/report/clean targets
- config/exclude.yaml migrated from tests/exclude_in_test.json
- config/website.tmpl.html copied from website/index.tmpl.html
- .gitignore updated for Go binary

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Makefile

@@ -0,0 +1,23 @@
+BINARY := awesome-docker
+.PHONY: build test lint check health report clean
+
+build:
+	go build -o $(BINARY) ./cmd/awesome-docker
+
+test:
+	go test ./internal/... -v
+
+lint: build
+	./$(BINARY) lint
+
+check: build
+	./$(BINARY) check
+
+health: build
+	./$(BINARY) health
+
+report: build
+	./$(BINARY) report
+
+clean:
+	rm -f $(BINARY)