docs(readme): point first-PR link to /contribute page

[lefarcen]

Summary

• The good-first-issue label link in every README locale points to https://github.com/nexu-io/open-design/labels/good-first-issue, which renders an empty list whenever no open issue carries that label.
• Switch the URL to https://github.com/nexu-io/open-design/contribute — GitHub's curated contribute page auto-pulls good-first-issue, help-wanted, and active items, so newcomers always land on something they can pick up.
• Wording is unchanged across all 10 README locales (md, zh-CN, zh-TW, ja-JP, ko, de, fr, pt-BR, ru, uk); only the link target changes.

Test plan

• Open each README on the PR and confirm the good-first-issue link points to /contribute.
• Click through /contribute to confirm GitHub renders curated entries (rather than an empty label page).

[lefarcen]

Lens B review

The change is well-motivated — switching from (which shows empty when no issues carry that label) to (GitHub's curated first-contribution page) gives newcomers a better landing.

P3 minor inconsistency: The link text still says good-first-issue label but now opens GitHub's repository contribution page, not the label page directly. This could confuse readers who expect to land on the label search or want to understand what they're clicking.

Optional refinement: update the localized text to say "Contribute page" or "contribution page" (and mention it includes good first issue items), so the link text matches the target.

Not blocking — the current wording is acceptable for a small UX improvement. Just flagging for completeness.

[lefarcen]

Lens B review

The change is well-motivated — switching from /labels/good-first-issue (which shows empty when no issues carry that label) to /contribute (GitHub's curated first-contribution page) gives newcomers a better landing.

P3 minor inconsistency: The link text still says good-first-issue label but now opens GitHub's repository contribution page, not the label page directly. This could confuse readers who expect to land on the label search or want to understand what they're clicking.

Optional refinement: update the localized text to say "Contribute page" or "contribution page" (and mention it includes good first issue items), so the link text matches the target.

Not blocking — the current wording is acceptable for a small UX improvement. Just flagging for completeness.

[mrcfps]

@lefarcen I reviewed the README locale updates and verified the changed ranges consistently move the first-PR good-first-issue link from the empty label URL to GitHub's curated /contribute page across all ten README variants, without changing the surrounding localized wording. Nice focused docs fix — this should make the newcomer path more useful. 🙂

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