feat(collection): add MyList interface

app/src/main/java/ru/project/collection/MyList.java

@@ -0,0 +1,16 @@
+package ru.project.collection;
+
+public interface MyList<T> {
+
+  void add(T element);
+
+  T get(int index);
+
+  T set(int index, T element);
+
+  T remove(int index);
+
+  int size();
+
+  boolean isEmpty();
+}