feat: add Currency & Crypto Converter app

[linkforceio]

What does this PR do?

Adds a new app to the App Store: Currency & Crypto Converter (a link-as-an-app).

It links users to a hosted tool that converts between major fiat currencies (EUR, USD, GBP, CHF) and cryptocurrencies (BTC, ETH, USDC) with live exchange rates. No OAuth, no backend, no stored data.

Type of change

• New feature (non-breaking change which adds functionality)

Notes

• Follows the link-as-an-app pattern (see amie, vimcal, pipedream): config.json with externalLink, DESCRIPTION.md, and static/ assets (icon + 3 screenshots).
• Registry updated accordingly: added to apps.metadata.generated.ts and redirect-apps.generated.ts.
• isOAuth: false, category other.

How should this be tested?

Open /apps/currency-crypto-converter and confirm the listing renders and the "Visit" action opens the external tool.

[github-actions]

Welcome to Cal.diy, @linkforceio! Thanks for opening this pull request.

A few things to keep in mind:

• This is Cal.diy, not Cal.com. Cal.diy is a community-driven, fully open-source fork of Cal.com licensed under MIT. Your changes here will be part of Cal.diy — they will not be deployed to the Cal.com production app.
• Please review our Contributing Guidelines if you haven't already.
• Make sure your PR title follows the Conventional Commits format.

A maintainer will review your PR soon. Thanks for contributing!

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: eb597034-1465-4be9-94bc-345de221d2ce

📥 Commits

Reviewing files that changed from the base of the PR and between f004349 and 2e38027.

⛔ Files ignored due to path filters (4)

• packages/app-store/currency-crypto-converter/static/1.jpg is excluded by !**/*.jpg
• packages/app-store/currency-crypto-converter/static/2.jpg is excluded by !**/*.jpg
• packages/app-store/currency-crypto-converter/static/3.jpg is excluded by !**/*.jpg
• packages/app-store/currency-crypto-converter/static/icon.svg is excluded by !**/*.svg

📒 Files selected for processing (4)

• packages/app-store/apps.metadata.generated.ts
• packages/app-store/currency-crypto-converter/DESCRIPTION.md
• packages/app-store/currency-crypto-converter/config.json
• packages/app-store/redirect-apps.generated.ts

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📝 Walkthrough

Walkthrough

Adds the Currency & Crypto Converter app configuration and store description. Registers its configuration in the exported app store metadata map and adds its identifier to the generated redirect app list, extending the derived RedirectApp type.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: adding the Currency & Crypto Converter app.
Description check	✅ Passed	The description is directly related to the new app and registry updates described in the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[petecooper]

FYI this looks like an attempt to score a backlink to the submitter site. See also: textpattern/textpattern-curated-plugins-list#34