Completes the three GitHub Community Standards items the repository was
missing: a Code of Conduct, issue templates, and a pull request template.
- CODE_OF_CONDUCT.md: Contributor Covenant 2.1, with contact@k-dense.ai as
the enforcement contact and a pointer to SECURITY.md for vulnerabilities.
- .github/ISSUE_TEMPLATE/: three issue forms (bug report, new skill request,
existing skill improvement) plus a config.yml that disables blank issues
and routes security reports to private vulnerability reporting.
- .github/PULL_REQUEST_TEMPLATE.md: mirrors the Pull Request Checklist in
CONTRIBUTING.md so contributors see the skill-format, validation, and
safety requirements before submitting.
- CONTRIBUTING.md: link the Code of Conduct.