chore: add package metadata links

[452740336]

Summary

Adds npm package metadata links for the public issue tracker and README homepage.

This is a small AI-assisted metadata cleanup. The package currently publishes repository and license metadata, but the latest npm metadata does not expose bugs or homepage.

Verification

npm view openapi-codegen-typescript@0.1.29 name version repository homepage bugs license --json
node -e "const p=require('./package.json'); console.log(JSON.stringify({name:p.name,version:p.version,repository:p.repository,bugs:p.bugs,homepage:p.homepage,license:p.license}, null, 2)); if (p.bugs?.url !== 'https://github.com/LandrAudio/openapi-codegen-typescript/issues' || p.homepage !== 'https://github.com/LandrAudio/openapi-codegen-typescript#readme') process.exit(1)"
git diff --check
npm pack --dry-run --json

[452740336]

Hi, checking in on this PR after a quiet review window.

• PR: chore: add package metadata links #57
• Scope: chore: add package metadata links
• Related bounty/reward: up to $5 XMR equivalent
  I do not see new review feedback yet. If there is anything you would like changed before this can be reviewed or merged, I can make a focused follow-up update.