Add structured GitHub issue forms

[Punisheroot]

Summary

Adds structured GitHub Issue Forms for bug reports and feature requests, plus security and project-status links. Blank issues remain available for cases not covered by the forms.

Implementation

The forms collect bounded reproduction, environment, outcome, impact, and acceptance-evidence details while warning against credentials, private source, sealed benchmark material, and public vulnerability disclosure.

Validation

pnpm dlx prettier@3.6.2 --check .github/ISSUE_TEMPLATE/*.yml
passed

git diff --cached --check
passed

Risks/limitations

GitHub renders the forms only after they reach the default branch. There is no runtime, API, storage, performance, or compatibility impact.

Documentation/evidence

Not applicable.

AI assistance and human verification

AI assistance: code
Human verification: Reviewed the complete three-file diff, required fields, existing labels, security routing, blank-issue fallback, YAML formatting, and absence of unrelated repository changes.

AI was used only for code assistance.

Ownership checklist

• I read and understand the complete diff and can explain every material change.
• I personally verified the reported tests and technical or performance claims.
• I finalized and personally published the commits and this pull request.
• I checked for unrelated edits, credentials, generated files, and live artifacts.
• Public documentation and PROJECT_STATUS.md are updated when applicable.