No .github community health files (issue/PR templates, CONTRIBUTING)

No \`.github/\` directory at all — no issue templates, no PR template, no \`CONTRIBUTING.md\`, no \`CODE_OF_CONDUCT.md\`, no \`FUNDING.yml\`.

For a repo being promoted for wider visibility, this matters: GitHub surfaces "Community Standards" completeness in the Insights tab, and contributors bounce off repos with no PR template / contribution guide.

**Ask:**
- \`.github/ISSUE_TEMPLATE/bug_report.md\` and \`feature_request.md\` (or a \`config.yml\` + forms)
- \`.github/PULL_REQUEST_TEMPLATE.md\`
- \`CONTRIBUTING.md\` — how to run the Worker locally (\`npm run worker:dev\`), how to test the CLI, coding conventions (there currently are none documented — see standards findings on PR #3)
- Optional: \`CODE_OF_CONDUCT.md\` if aiming for outside contributors

Create the requested .github/ISSUE_TEMPLATE/bug_report.md, feature_request.md, and PULL_REQUEST_TEMPLATE.md files, plus CONTRIBUTING.md. Start by checking the existing npm run worker:dev command and the CLI testing workflow; document local Worker setup, CLI testing, and conventions. Done means the community files exist and contributors can follow the guide, with CODE_OF_CONDUCT.md left as an optional separate addition.

Written by the indexing model from the issue text.