Join a list of strings into a single string with the specified delimiter.
Examples:
Input: strings = ['apple', 'banana', 'cherry'], delimiter = ', '
Output: 'apple, banana, cherry'
Explanation: The strings are joined with the delimiter ', ' between each element
Input: strings = ['one', 'two', 'three'], delimiter = '-'
Output: 'one-two-three'
Explanation: The strings are joined with the delimiter '-' between each element
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