Add Ruby code blocks to the documents (#1200)

* Add Ruby code blocks to documents

* Remove Ruby code from en/docs

docs/chapter_computational_complexity/time_complexity.md

@@ -186,6 +186,12 @@
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title=""
+
+    ```
+
 === "Zig"
 
     ```zig title=""
@@ -465,6 +471,12 @@ $$
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title=""
+
+    ```
+
 === "Zig"
 
     ```zig title=""
@@ -673,6 +685,12 @@ $$
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title=""
+
+    ```
+
 === "Zig"
 
     ```zig title=""
@@ -949,6 +967,12 @@ $T(n)$ 是一次函数，说明其运行时间的增长趋势是线性的，因
     }
     ```
 
+=== "Ruby"
+
+    ```ruby title=""
+
+    ```
+
 === "Zig"
 
     ```zig title=""