Add Sliding_Window_XOR working solution

[DataWorshipper]

Description of Change

This pull request adds a Python implementation of the Sliding Window XOR problem to the Bit Manipulation section.

The algorithm calculates the bitwise XOR of every window of size k in an array of n integers generated using the recurrence relation:

arr[0] = x # first element arr[i] = (multiplier * arr[i-1] + increment) % modulo # for i = 1 to n-1

It maintains a sliding window of size k using two pointers, efficiently computing the cumulative XOR of all windows in O(n) time with O(n) space.

The submission is self-contained, with detailed docstrings, a class-based interface (SlidingWindowXOR), and a main section that runs multiple verified test cases to ensure correctness.

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new Python files are placed inside an existing directory.
• All filenames are in all lowercase characters with no spaces or dashes.
• All functions and variable names follow Python naming conventions.
• All function parameters and return values are annotated with Python type hints.
• All functions have doctests that pass the automated testing.
• All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".

[algorithms-keeper]

Click here to look at the relevant links ⬇️

🔗 Relevant Links

Repository:

• Contributing guidelines
• Project Euler solution guidelines

Python:

• Formatted string literals (f-strings)
• Type hints
• doctest
• unittest
• pytest

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[algorithms-keeper]

Please provide descriptive name for the parameter: n

Please provide descriptive name for the parameter: k

Please provide descriptive name for the parameter: x