Enhance AGENTS.md with comprehensive Copilot coding agent instructions

[Copilot]

Configure repository-specific instructions for GitHub Copilot coding agents per best practices documented at gh.io/copilot-coding-agent-tips.

Changes

Expanded existing AGENTS.md from basic conventions to comprehensive agent guidance:

• Project Context: Repository overview, technology stack (Python 3.9+, Flask, pytest, Ruff), and educational focus
• Project Structure: Complete directory layout with module organization (algorithms/, graphs/, dp/, etc.)
• Development Commands: Setup, test execution, linting/formatting, demo running, and documentation building
• Code Standards: Algorithm implementation template with complexity notation, naming conventions, and docstring requirements
• Architecture: Demo discovery system, pattern categorization, and deterministic testing requirements
• Testing: Framework configuration in pyproject.toml, coverage defaults, and test writing guidelines
• Security & Dependencies: No hardcoded secrets, minimal dependencies, local-only Flask app
• Workflows: Pre-commit hooks, CI pipeline steps, and PR acceptance criteria
• Agent-Specific Guidance: Common pitfalls, quick reference commands, and development cycle summary

Example Structure

Agents now receive clear implementation guidance:

def algorithm_name(input_data, param=default):
    """
    Brief description of what the algorithm does.
    
    Time complexity: O(n log n)
    Space complexity: O(n)
    
    Args:
        input_data: Description
        param: Description (default: value)
    
    Returns:
        Description of return value
    
    Common pitfalls:
    - Edge case 1
    - Edge case 2
    """
    pass

def demo():
    """Demonstrate the algorithm with examples."""
    pass

Includes clarifications that test configuration lives in pyproject.toml (not pytest.ini) and that pytest -q runs with coverage by default.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>✨ Set up Copilot instructions</issue_title>
<issue_description>Configure instructions for this repository as documented in Best practices for Copilot coding agent in your repository.

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes ✨ Set up Copilot instructions #2

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[Copilot]

Pull Request Overview

This PR applies consistent code formatting across multiple Python files, primarily converting multi-line list comprehensions and function signatures to single-line format where appropriate. The changes improve code conciseness while maintaining readability, aligning with Python style conventions for shorter constructs.

Key Changes:

• Consolidated multi-line list comprehensions and function signatures to single lines
• Added blank lines for better spacing in docs_server.py
• Significantly expanded the AGENTS.md documentation with comprehensive guidelines for AI coding agents

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
flask_app/visualizations/topo_viz.py	Consolidated list comprehension from 2 lines to 1 line
flask_app/visualizations/sorting_viz.py	Consolidated function signatures from 3 lines to 1 line
flask_app/visualizations/path_viz.py	Consolidated multiple list initializations and function signatures to single lines
flask_app/visualizations/nn_viz.py	Consolidated list comprehension and loss calculation to single lines
flask_app/visualizations/mst_viz.py	Consolidated function signatures to single lines
flask_app/visualizations/graph_viz.py	Consolidated function signatures to single lines
flask_app/visualizations/array_viz.py	Consolidated list initializations and function calls to single lines
flask_app/docs_server.py	Added blank lines for improved spacing between imports and function definitions
flask_app/app.py	Consolidated list comprehensions and error handling to maintain line length limits
AGENTS.md	Expanded from basic guidelines to comprehensive 450+ line documentation for AI agents

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