GT AI OS Community v2.0.33 - Add NVIDIA NIM and Nemotron agents

- Updated python_coding_microproject.csv to use NVIDIA NIM Kimi K2
- Updated kali_linux_shell_simulator.csv to use NVIDIA NIM Kimi K2
  - Made more general-purpose (flexible targets, expanded tools)
- Added nemotron-mini-agent.csv for fast local inference via Ollama
- Added nemotron-agent.csv for advanced reasoning via Ollama
- Added wiki page: Projects for NVIDIA NIMs and Nemotron

CONTRIBUTING.md

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+# Contributing to GT AI OS Community
+
+Thank you for your interest in GT AI OS Community Edition.
+
+## Reporting Issues
+
+All contributions are handled through GitHub Issues.
+
+### Bug Reports
+
+To report a bug, please open a new issue at:
+https://github.com/gt-edge-ai/gt-ai-os-community/issues
+
+Include the following information:
+- Description of the issue
+- Steps to reproduce
+- Expected behavior vs. actual behavior
+- Platform (macOS, Ubuntu, or DGX)
+- Relevant error messages or logs
+
+### Feature Requests
+
+To request a new feature, open a GitHub Issue with:
+- Description of the proposed feature
+- Use case and benefits
+- Any implementation suggestions (optional)
+
+### Questions
+
+For questions about GT AI OS, open a GitHub Issue with "Question:" at the beginning of the title.
+
+## Code of Conduct
+
+All participants must adhere to our [Code of Conduct](CODE_OF_CONDUCT.md).
+
+## License
+
+By participating in this project, you agree that any contributions will be licensed under the [Apache License 2.0](LICENSE).