app-catalog: Display current and latest app versions in list

[skoeva]

This change adds the latest app version in the app-catalog list, allowing users to see if their app version is out of date and requires an update.

The "App Version" column has become "Current Version" to reflect the current app version, and the "Latest Version" column reflects the latest app version.

Fixes: #342

Testing

• Run cd app-catalog && npm run build && npm run start in one terminal
• In another terminal, open a cluster in Headlamp and navigate to the app catalog
• Open the "Installed" list and notice the current and latest versions

[Copilot]

Pull Request Overview

This change enhances the app-catalog list to display both current and latest app versions, helping users identify when their installed applications need updates. The existing "App Version" column is renamed to "Current Version" and a new "Latest Version" column is added that fetches the latest available versions from ArtifactHub.

• Adds a new API function to fetch latest app versions from ArtifactHub
• Implements version formatting with consistent "v" prefix handling
• Updates the releases list to show both current and latest versions side by side

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
app-catalog/src/api/charts.tsx	Adds fetchLatestAppVersion function to query ArtifactHub API for latest app versions
app-catalog/src/components/releases/List.tsx	Adds version formatting utility, fetches latest versions, and updates table columns to display both current and latest versions

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[illume]

Thanks for this.

Left a couple of notes, and checked the copilot review comments.

[illume]

🎉 thanks!