[Feature] Optimize news and add-on pages with proper lazy loading

[3vorp]

Is your feature request related to a problem?

Currently, all add-ons/posts are loaded at once on their respective pages, which can freeze the browser for a long time.

Describe the feature you'd like

Lazy load the card grids to only load around 10-15 cards at a time and increase the number using a scroll event listener and a sticky bottom element (like the texture gallery).

Screenshot(s)

Texture gallery implemented this ages ago: https://github.com/Faithful-Resource-Pack/App/blob/main/pages/gallery/gallery-grid.vue#L267-L275

Notes

No response