Restructured project

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

backend/src/utils/numbers.go

@@ -0,0 +1,11 @@
+package utils
+
+import (
+	"strconv"
+	"strings"
+)
+
+func ParseFloat(value string) (float64, error) {
+	value = strings.ReplaceAll(value, ",", ".")
+	return strconv.ParseFloat(value, 64)
+}