Add npm support metadata

[yanziwei]

Summary

• add homepage metadata for the published @1password/op-js npm package
• add bugs.url metadata pointing npm users to this repository's issue tracker
• leave runtime code, dependencies, exports, and package contents unchanged

Why

The current @1password/op-js@0.1.13 package exposes its repository but omits homepage and bugs metadata, so npm clients do not show the README or issue tracker links directly from package metadata.

This is also the upstream fix for the public reproducibility lead I filed at charles-openclaw/charles-microbounties#869.

Verification

node - <<'NODE'
const fs = require('fs');
const p = JSON.parse(fs.readFileSync('package.json', 'utf8'));
if (p.homepage !== 'https://github.com/1Password/op-js#readme') throw new Error('missing homepage');
if (p.bugs?.url !== 'https://github.com/1Password/op-js/issues') throw new Error('missing bugs.url');
console.log(JSON.stringify({ name: p.name, homepage: p.homepage, bugs: p.bugs }, null, 2));
NODE

git diff --check
npm pack --dry-run --ignore-scripts --json