Restructured project

- backend moved to backend directory
- added and initialized frontend with vue
- moved infrastructure files to infra directory

backend/src/config/runMode.go

@@ -0,0 +1,28 @@
+package config
+
+import (
+	"fmt"
+	"strings"
+)
+
+type RunMode string
+
+const (
+	Bot        RunMode = "bot"
+	API        RunMode = "api"
+	Standalone RunMode = "standalone"
+	Unknown    RunMode = "unknown"
+)
+
+func ParseRunMode(s string) (RunMode, error) {
+	switch strings.ToLower(s) {
+	case "bot":
+		return Bot, nil
+	case "api":
+		return API, nil
+	case "standalone":
+		return Standalone, nil
+	default:
+		return Unknown, fmt.Errorf("invalid run mode: %s", s)
+	}
+}