feat: add some functons of singlelink

datastructure/linknode.go

@@ -0,0 +1,13 @@
+package datastructure
+
+// LinkNode is a linkedlist node, which have a value and Pre points to previous node, Next points to a next node of the link.
+type LinkNode[T any] struct {
+	Value T
+	Pre   *LinkNode[T]
+	Next  *LinkNode[T]
+}
+
+func NewLinkNode[T any](value T) *LinkNode[T] {
+	return &LinkNode[T]{value, nil, nil}
+}
+