feat: add server-side search, filter and sorter for all pages (#388)

Signed-off-by: Yixiang Zhao <seriouszyx@foxmail.com>

Co-authored-by: Yang Luo <hsluoyz@qq.com>

util/string.go

@@ -162,3 +162,21 @@ func WriteBytesToPath(b []byte, path string) {
 		panic(err)
 	}
 }
+
+// SnakeString XxYy to xx_yy
+func SnakeString(s string) string {
+	data := make([]byte, 0, len(s)*2)
+	j := false
+	num := len(s)
+	for i := 0; i < num; i++ {
+		d := s[i]
+		if i > 0 && d >= 'A' && d <= 'Z' && j {
+			data = append(data, '_')
+		}
+		if d != '_' {
+			j = true
+		}
+		data = append(data, d)
+	}
+	return strings.ToLower(string(data[:]))
+}