Add missing documentation files and README sections for CI/CD compliance

[Copilot]

CI/CD review identified missing standard documentation files and README sections. This PR adds the required documentation to meet open source project standards.

Added Documentation Files

• CONTRIBUTING.md - Development setup, testing workflow, PR process
• CHANGELOG.md - Version history following Keep a Changelog format
• CODE_OF_CONDUCT.md - Community standards (Contributor Covenant v2.0)
• SECURITY.md - Vulnerability reporting, security best practices for CDP/WebSocket usage

README Updates

• Added API Documentation section with links to Read the Docs, CDP spec, and key modules
• Added Contributing section referencing new CONTRIBUTING.md
• Added Security section referencing new SECURITY.md
• Removed duplicate Sans-I/O Mode heading

Notes

• LICENSE already exists (incorrectly flagged as LICENSE.md missing)
• Build passes successfully: all 39 tests pass, mypy clean
• Documentation-only changes, no code modifications

Original prompt

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This section details on the original issue you should resolve

<issue_title>Complete CI/CD Review - 2025-12-11</issue_title>
<issue_description># Complete CI/CD Agent Review Report

Review Date: $(date -u +"%Y-%m-%d %H:%M:%S UTC")
Repository: HyperionGray/python-chrome-devtools-protocol
Branch: master
Trigger: push

Executive Summary

This comprehensive review covers:

• ✅ Code cleanliness and file size analysis
• ✅ Test coverage and Playwright integration
• ✅ Documentation completeness and quality
• ✅ Build functionality verification

Detailed Findings

Build Status

Build result: false

Code Cleanliness Analysis

Large Files (>500 lines):

4634 lines: ./cdp/network.py
4004 lines: ./cdp/page.py
2673 lines: ./cdp/css.py
2438 lines: ./cdp/storage.py
2189 lines: ./cdp/dom.py
1838 lines: ./cdp/audits.py
1663 lines: ./cdp/emulation.py
1589 lines: ./cdp/runtime.py
1405 lines: ./cdp/debugger.py
1397 lines: ./cdp/overlay.py
1063 lines: ./generator/generate.py
979 lines: ./generator/test_generate.py
876 lines: ./cdp/dom_snapshot.py
819 lines: ./cdp/browser.py
790 lines: ./cdp/target.py
701 lines: ./cdp/input_.py
668 lines: ./cdp/accessibility.py
626 lines: ./cdp/bluetooth_emulation.py
606 lines: ./cdp/web_audio.py
581 lines: ./cdp/web_authn.py
569 lines: ./cdp/preload.py
528 lines: ./cdp/indexed_db.py
518 lines: ./cdp/security.py
507 lines: ./cdp/fetch.py

Documentation Analysis

Essential Documentation Files:

✅ README.md (424 words)
❌ CONTRIBUTING.md (missing)
❌ LICENSE.md (missing)
❌ CHANGELOG.md (missing)
❌ CODE_OF_CONDUCT.md (missing)
❌ SECURITY.md (missing)

README.md Content Check:

✅ Contains 'Installation' section
✅ Contains 'Usage' section
✅ Contains 'Features' section
⚠️ Missing 'Contributing' section
✅ Contains 'License' section
✅ Contains 'Documentation' section
✅ Contains 'Examples' section
⚠️ Missing 'API' section

Next Steps - Amazon Q Review

After reviewing these GitHub Copilot agent findings, Amazon Q will provide additional insights:

• Security analysis
• Performance optimization opportunities
• AWS best practices
• Enterprise architecture patterns

Action Items Summary

• Review and address code cleanliness issues
• Fix or improve test coverage
• Update documentation as needed
• Resolve build issues
• Wait for Amazon Q review for additional insights

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This issue was automatically generated by the Complete CI/CD Review workflow.
Amazon Q review will follow automatically.
</issue_description>

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

• Fixes Complete CI/CD Review - 2025-12-11 #60

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Note

Adds missing standard documentation and improves discoverability without code changes.

• Introduces CHANGELOG.md, CONTRIBUTING.md, CODE_OF_CONDUCT.md, and SECURITY.md
• Updates README.md: adds API documentation links and key modules, new contributing and security sections, removes duplicate Sans-I/O heading

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