feat: ratelimit, ghcr package support, media path sensitization, LID to CN migration (#6)

* feat: ratelimit, ghcr package and proper project refactor from askarzh

* fix(bridge): validate media path

* update: dependencies

* fix: added LID to contact number migration

whatsapp-bridge/logger/logger.go

@@ -0,0 +1,24 @@
+package logger
+
+import (
+	"log/slog"
+	"os"
+	"strings"
+)
+
+// New returns a JSON slog.Logger configured at the given level.
+// Accepted levels: "debug", "info", "warn", "error". Anything else falls back to info.
+func New(level string) *slog.Logger {
+	var lvl slog.Level
+	switch strings.ToLower(strings.TrimSpace(level)) {
+	case "debug":
+		lvl = slog.LevelDebug
+	case "warn", "warning":
+		lvl = slog.LevelWarn
+	case "error":
+		lvl = slog.LevelError
+	default:
+		lvl = slog.LevelInfo
+	}
+	return slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{Level: lvl}))
+}