Implement IP API daemon with GeoIP database support

- Create modular architecture with separate packages for config, database, HTTP, logging, and state management
- Implement Cobra CLI with daemon command
- Set up Uber FX dependency injection
- Add Chi router with health check and IP lookup endpoints
- Implement GeoIP database downloader with automatic updates
- Add state persistence for tracking database download times
- Include comprehensive test coverage for all components
- Configure structured logging with slog
- Add Makefile with test, lint, and build targets
- Support both IPv4 and IPv6 lookups
- Return country, city, ASN, and location data in JSON format

Makefile

@@ -0,0 +1,24 @@
+.PHONY: test fmt lint build clean
+
+# Default target
+test: lint
+	go test -v ./...
+
+fmt:
+	go fmt ./...
+
+lint:
+	go vet ./...
+	golangci-lint run
+	go mod tidy
+
+build:
+	go build -o bin/ipapi ./cmd/ipapi
+
+clean:
+	rm -rf bin/
+
+run: build
+	./bin/ipapi daemon
+
+.DEFAULT_GOAL := test