Write a program that prompts the user for a non-negative integer height (e.g., between 0 and 23) and prints a right-aligned half-pyramid of that height using the # character. Non-positive heights should produce no pyramid.

Example (height = 3):

Tasks:

• Prompt for an integer height and validate the input range.
• Print a half-pyramid aligned to the right for the given height.

Hints:

• Use nested loops: the outer loop over rows, the inner loops for spaces and # characters.
• Start with a small example on paper to determine how many spaces and hashes each row needs.

Notes: Add sample tests and expected outputs in a tests/ folder if you want to add automated checks later.

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