feat(v2): link Hasheous provider to game detail page

[gantoine]

Description
^{Explain the changes or enhancements you are proposing with this pull request.}

Adds a URL builder for the Hasheous provider in the v2 GameDetails provider registry. Previously its card rendered unlinked (url: null); it now links out to the corresponding game page on hasheous.org, matching the behavior of the other metadata providers in the grid.

Checklist
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• I've tested the changes locally
• I've updated relevant comments
• I've assigned reviewers for this PR
• I've added unit tests that cover the changes

Screenshots (if applicable)

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AI assistance disclosure: This change was written with AI assistance (PostHog Code). The provider URL pattern was authored and reviewed by AI.

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Created with PostHog Code

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[greptile-apps]

Greptile Summary

This PR links the Hasheous card on the v2 game detail page.

• Adds a Hasheous game URL builder to the provider registry.
• Uses the existing Hasheous game-page URL pattern.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
frontend/src/v2/components/GameDetails/providers.ts	Adds a Hasheous URL builder using the established route and numeric provider ID.

_{Reviews (1): Last reviewed commit: "feat(v2): link Hasheous provider to game..." | Re-trigger Greptile}