Add: ArrayQueue Implementation in Python

[saishmungase]

Description

This PR adds an implementation of a basic Queue data structure using a standard Python list (array-based).

• File Added: Python/data_structures/queue/array_queue.py
• Functionality: Implements enqueue, dequeue, peek, is_empty, size.
• Follows FIFO principle.

Algorithm Description (Included in code comments)

Uses a Python list for storage. enqueue uses append(), dequeue uses pop(0).

Complexity Analysis (Included in code comments)

• Time Complexity:
  • Enqueue: O(1) average
  • Dequeue: O(n)
  • Peek: O(1)
• Space Complexity: O(n)

Checklist

• Code follows the project's contributing guidelines (folder structure, naming).
• Code includes algorithm description comment.
• Code includes time and space complexity analysis.
• Code is tested (includes doctests).
• Commit message follows the specified format.
• This PR adds one specific data structure implementation.

[github-actions]

🎉 Welcome to Hacktoberfest 2025, @saishmungase! 🎃

Thank you for your first contribution to our DSA repository! Here's what happens next:

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• ✅ Code Validation: Passed
• 🧪 Compilation Tests: Passed

📋 Next Steps

🎯 Great job! Your code compiled successfully. Maintainers @Karanjot786 and @Pradeepsingh61 will review your PR soon.

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💡 Tips for Success

• Follow our Contributing Guidelines
• Add comments explaining your algorithm
• Include time/space complexity analysis
• Test your code before submitting

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[github-actions]

🤖 Automated PR Status

🔍 Code Validation

✅ Passed - File naming and structure look good!

🧪 Compilation Tests

✅ Passed - All code compiles successfully!

📋 Overall Status

🎉 Ready for Review - Your PR has passed all automated checks!
👥 Maintainers have been notified for review.

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[saishmungase]

Hey @Pradeepsingh61 , @Karanjot786 Can You Please check this PR ?