feat: Add ruby code - chapter "array & linked list" (#1158)

* feat: add ruby code chapter array & linked list

- array.rb
- linked_list.rb
- list.rb
- my_list.rb

* feat: add ruby code blocks

* chore: fix convention

docs/chapter_array_and_linkedlist/array.md

@@ -121,6 +121,14 @@
     var nums = [_]i32{ 1, 3, 2, 5, 4 };
     ```
 
+=== "Ruby"
+
+    ```ruby title="array.rb"
+    # 初始化数组
+    arr = Array.new(5, 0)
+    nums = [1, 3, 2, 5, 4]
+    ```
+
 ??? pythontutor "可视化运行"
 
     https://pythontutor.com/render.html#code=%23%20%E5%88%9D%E5%A7%8B%E5%8C%96%E6%95%B0%E7%BB%84%0Aarr%20%3D%20%5B0%5D%20*%205%20%20%23%20%5B%200,%200,%200,%200,%200%20%5D%0Anums%20%3D%20%5B1,%203,%202,%205,%204%5D&cumulative=false&curInstr=0&heapPrimitives=nevernest&mode=display&origin=opt-frontend.js&py=311&rawInputLstJSON=%5B%5D&textReferences=false