feat：完善项目

utils/string.go

@@ -0,0 +1,30 @@
+package utils
+
+import (
+	"strings"
+)
+
+func ToLowerCase(src []rune) rune {
+	return src[0] | 0x20
+}
+
+func ToUpperCase(src []rune) rune {
+	return src[0] ^ 0x20
+}
+
+func ToSnake(src, delimiter string) string {
+	src = strings.TrimSpace(src)
+	objs := strings.Split(src, delimiter)
+
+	out := make([]rune, 0)
+
+	for _, v := range objs {
+		if len(v) <= 0 {
+			continue
+		}
+		obj := []rune(v)
+		obj[0] = ToUpperCase(obj)
+		out = append(out, obj...)
+	}
+	return string(out)
+}