Add security policy, PR template, and issue templates

[killerlux]

This PR adds: SECURITY.md (security policy), Pull request template, Feature request and question issue templates. No code of conduct included as requested. Ready for review and merge.

Summary by Sourcery

Add project governance and community support files to improve project documentation and contribution guidelines

Enhancements:

• Improved video capture device detection with more verbose logging
• Added CPU execution provider handling
• Enhanced camera initialization diagnostics

Documentation:

• Added comprehensive README installation instructions for Linux
• Added security policy document
• Created pull request and issue templates to guide contributions

Chores:

• Added GitHub issue templates for feature requests and questions
• Created pull request template to standardize contribution process

[sourcery-ai]

Reviewer's Guide

This pull request introduces community health files (PR template, issue templates, security policy) by adding new markdown files under the .github/ directory. It also improves the setup and execution experience by updating the README with Linux instructions and CPU usage details, refining camera detection logic in video_capture.py with added logging, and ensuring GPU resources are disabled in core.py when CPU execution is specified.

File-Level Changes

Change	Details	Files
Add community health files (PR/Issue templates, Security Policy).	Added a standard pull request template. Added an issue template for feature requests. Added an issue template for questions. Added a security policy file (SECURITY.md).	.github/PULL_REQUEST_TEMPLATE.md .github/ISSUE_TEMPLATE/feature_request.md .github/ISSUE_TEMPLATE/question.md .github/SECURITY.md
Improve setup instructions and CPU execution handling.	Added detailed Linux (Debian/Ubuntu) setup instructions to README. Updated README run command to include CPU execution provider flag. Added logic to disable CUDA environment variables and clear cache when CPU provider is explicitly used.	README.md modules/core.py
Enhance camera device detection and initialization logging.	Modified camera opening logic to try multiple device indices and backends (especially for Linux). Added verbose print statements during camera device probing and opening. Added print statement to show actual camera settings (resolution, FPS) after successful initialization.	modules/video_capture.py

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[sourcery-ai]

Hey @killerlux - I've reviewed your changes - here's some feedback:

• Consider separating the repository configuration changes (templates, security policy) from the code changes into distinct pull requests.
• Remove the debugging print statements added in modules/video_capture.py before merging.
• Update the placeholder email address in SECURITY.md.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟡 Security: 1 issue found
• 🟢 Testing: all looks good
• 🟢 Documentation: all looks good

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[sourcery-ai]

🚨 issue (security): Replace placeholder email address.

Provide the actual email address for reporting vulnerabilities.