add a lot

utils/containers/linked_list/types.go

@@ -0,0 +1,12 @@
+package llist
+
+type LinkedList[T any] struct {
+	size uint
+	head *Node[T]
+	tail *Node[T]
+}
+
+type Node[T any] struct {
+	elem T
+	next *Node[T]
+}