refactor: content tab styling

[IMB11]

+ some external file improvements

[modrinth-bot]

Pull request changelog

App

Added

• Added detailed Content tab filters for authors, categories, enabled state, updates, warnings, open-source projects, external files, and shared content.
• External files now show embedded names, versions, and icons in the Content tab.
• Added total playtime to server instance headers, replacing the "Linked to server" text which is no longer needed due to the content tab changes.

Changed

• Redesigned the Content tab to separate managed modpack, server, and shared-instance content from manually added content.
• Moved shared-instance update notifications and actions into the Content tab's managed-content card.
• Replaced the Content tab's cycling sort control with a menu for alphabetical and date-added sorting.

Deprecated

Removed

Fixed

• Fixed exported modpacks requiring client-only content on servers and server-only content on clients.
• Fixed the Discover page hiding compatible resource packs and vanilla shaders when browsing content for an instance.
• Fixed server project instances which used vanilla appearing as unlinked in Installation settings.

Security

Website

Added

Changed

Deprecated

Removed

Fixed

Security

Hosting

Added

• Added Content tab filters for authors, categories, enabled state, updates, warnings, open-source projects, and external files.

Changed

• Redesigned the Content tab's modpack card to summarize modpack content separately from manually added content.
• Replaced the Content tab's cycling sort control with a menu for alphabetical and date-added sorting.

Deprecated

Removed

Fixed

Security

[modrinth-bot]

Frontend previews

Last deployed commit is 6d5399dd4e52adcb2f4b083546957de92dbe0848

Persistent

Environment	URL
staging	https://pr-7091-staging-frontend.modrinth.workers.dev
production	https://pr-7091-frontend.modrinth.workers.dev
storybook	https://pr-7091-storybook.modrinth.workers.dev

Latest commit

Environment	URL
staging	https://git-6d5399dd-staging-frontend.modrinth.workers.dev
production	https://git-6d5399dd-frontend.modrinth.workers.dev
storybook	https://git-6d5399dd-storybook.modrinth.workers.dev