Dice roller

[vivek2004-sec]

Description

This PR adds a dice-rolling simulator feature to the project. It allows a user to specify how many dice they want to roll, then displays each rolled die as ASCII/box-drawing art (instead of plain numbers), first in a vertical layout (one die's art fully printed before the next) and then in a horizontal layout (dice printed side-by-side, row by row, mimicking a real dice throw on a table). Finally, it calculates and prints the total sum of all dice rolled.
The visual representation is built using a dice_art dictionary that maps each die face (1–6) to a 5-line tuple of strings drawn with box-drawing characters (┌, ─, │, └) and dot symbols (●) to represent pips, closely resembling a physical die face.
Problem it solves: Plain text output like [3, 5, 1] for dice rolls is unintuitive and unengaging. This feature makes dice rolls visually intuitive and more fun to read, which is especially useful for CLI-based board game tools, tabletop RPG utilities, or teaching demos involving loops/dictionaries.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Code cleanup/refactoring

Related Issues

Closes #(issue number)

Testing

Please describe the tests you've run to verify your changes:

• Manual testing
• Added automated tests
• Existing tests pass

Checklist

• My code follows the project's code style
• I have commented my code, particularly in hard-to-understand areas
• I have updated the README.md if needed
• My changes generate no new warnings
• I have tested my code locally
• New and existing tests pass with my changes

Screenshots (if applicable)

Add screenshots or demos of your changes if relevant.