input: Write a python function to search for a keyword in a SQLite database and return the results.
  assert search_keyword('apple') == [('apple', 'fruit'), ('apple pie', 'dessert')]
  assert search_keyword('banana') == [('banana', 'fruit'), ('banana bread', 'dessert')]
  assert search_keyword('chocolate') == [('chocolate', 'sweet'), ('chocolate cake', 'dessert')]
output: def search_keyword(keyword):
      import sqlite3
      
      # Connect to the database (assuming the database name is 'example.db')
      conn = sqlite3.connect('example.db')
      cursor = conn.cursor()
      
      # Execute the query to search for the keyword
      query = "SELECT * FROM items WHERE name LIKE ?"
      cursor.execute(query, ('%' + keyword + '%',))
      
      # Fetch all matching rows
      results = cursor.fetchall()
      
      # Close the connection
      conn.close()
      
      return results