feat: rewrite LoLdleData in Go

4-stage pipeline: fetch ddragon champions, enrich with release dates
(wiki scrape), regions (Universe API), and lanes (wiki scrape).
Concurrent gender detection via goroutines with semaphore.

data/main.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/tiennm99/loldle-data/parser"
+)
+
+func main() {
+	champions, err := parser.ParseChampions(championsVersion)
+	if err != nil {
+		log.Fatalf("Failed to parse champions: %v", err)
+	}
+
+	champions, err = parser.EnrichReleaseDates(champions)
+	if err != nil {
+		log.Fatalf("Failed to enrich release dates: %v", err)
+	}
+
+	champions, err = parser.EnrichRegions(champions)
+	if err != nil {
+		log.Fatalf("Failed to enrich regions: %v", err)
+	}
+
+	champions, err = parser.EnrichLanes(champions)
+	if err != nil {
+		log.Fatalf("Failed to enrich lanes: %v", err)
+	}
+
+	outputPath := "champions.json"
+	if err := saveJSON(outputPath, champions); err != nil {
+		log.Fatalf("Failed to save JSON: %v", err)
+	}
+
+	fmt.Printf("Champion data has been saved to %s\n", outputPath)
+}
+
+func saveJSON(path string, data []parser.ChampionResult) error {
+	file, err := os.Create(path)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	encoder := json.NewEncoder(file)
+	encoder.SetIndent("", "    ")
+	return encoder.Encode(data)
+}