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

cmd/ipapi/main.go

@@ -0,0 +1,10 @@
+// Package main is the entry point for the ipapi command.
+package main
+
+import (
+	"git.eeqj.de/sneak/ipapi/internal/ipapi"
+)
+
+func main() {
+	ipapi.CLIEntry()
+}