Add bugs metadata to published packages

[tonghuaxingdsb]

Summary

• add standard npm bugs.url metadata for all published packages in this repository
• point the issue tracker link at the public DataDog/build-plugins issues page

Covered packages:

• @datadog/esbuild-plugin
• @datadog/rollup-plugin
• @datadog/rspack-plugin
• @datadog/vite-plugin
• @datadog/webpack-plugin

Verification

• node -e "const fs=require('fs'); const path=require('path'); const dir='packages/published'; const out={}; for (const name of fs.readdirSync(dir)) { const file=path.join(dir,name,'package.json'); if (!fs.existsSync(file)) continue; const p=require('./'+file.replace(/\\/g,'/')); out[p.name]={homepage:p.homepage,bugs:p.bugs,repository:p.repository}; if(p.bugs?.url!=='https://github.com/DataDog/build-plugins/issues') process.exitCode=1; } console.log(JSON.stringify(out,null,2));"
• git diff --check

[yoannmoinet]

Thanks for your contribution.
This should be done for all the published packages in the repository.
Not just vite.

[tonghuaxingdsb]

Thanks for the review. I updated the PR to add bugs.url to all published packages in packages/published: esbuild, rollup, rspack, vite, and webpack. I also updated the PR description with the full validation command.

[yoannmoinet]

Thanks for your contribution, this looks good.

[yoannmoinet]

@tonghuaxingdsb you need to sign your commits, can't merge without it.