feat: Add ruby codes - chapter "Heap" (#1300)

* init heap Ruby

* feature: finish chapter heap for ruby

* fix delete heap.rb

* fix: Fix code style

* Update codes/ruby/chapter_heap/my_heap.rb

Co-authored-by: khoaxuantu <68913255+khoaxuantu@users.noreply.github.com>

* Update codes/ruby/chapter_heap/top_k.rb

Co-authored-by: khoaxuantu <68913255+khoaxuantu@users.noreply.github.com>

* fix: apply the suggested changes

* fix to_a

* Update my_heap.rb

---------

Co-authored-by: khoaxuantu <68913255+khoaxuantu@users.noreply.github.com>
Co-authored-by: Yudong Jin <krahets@163.com>

codes/ruby/utils/print_util.rb

@@ -4,6 +4,8 @@ Created Time: 2024-03-18
 Author: Xuan Khoa Tu Nguyen (ngxktuzkai2000@gmail.com)
 =end
 
+require_relative "./tree_node"
+
 ### 打印矩阵 ###
 def print_matrix(mat)
   s = []
@@ -68,3 +70,11 @@ end
 def print_hash_map(hmap)
   hmap.entries.each { |key, value| puts "#{key} -> #{value}" }
 end
+
+### 打印堆 ###
+def print_heap(heap)
+  puts "堆的数组表示：#{heap}"
+  puts "堆的树状表示："
+  root = arr_to_tree(heap)
+  print_tree(root)
+end