Add integration with Hoarder (self-hostable bookmark-everything app)

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• [X] I have read this document: https://miniflux.app/opinionated.html#feature-request

I recently migrated from Shiori to Hoarder for several reasons. In short, Hoarder offers AI tags via a local Ollama API, mobile apps, a functional browser extension, and a polished UI. I’m loving it so far! 😊

Hoarder's API/CLI interface interface appears straightforward, with commands for adding new bookmarks. This functionality is sufficient for starring feed items in Miniflux and having them bookmarked in Hoarder, right?

I’d love to see an integration in Hoarder that matches the functionality of integrations available for Shiori, Wallabag, and others.