[FR]: Modern article list

[martinrotter]

Brief description of the feature request

This is one ticket to replace bunch of other tickets/discussions, to have all related info in one place.

Add modern article list, which takes inspiration from:

• NewsFlash
• Fluent Reader
• https://www.reddit.com/r/selfhosted/comments/kzq3mr/rss_reader_with_tiled_card_view/
• https://stackoverflow.com/questions/1956542/how-to-make-item-view-render-rich-html-text-in-qt/1956781#1956781

Features:

• newspaper-like approach, neverending stream of articles per selected feed/etc,
• no need to have article previewer active, works standalone,
• will display simplified excerpt (first few sentences) of article, (maybe) on click will expand the "card" and show full simplified article, perhaps with images,
• layout could resemble "card view" - few columns (depending on viewport width) where articles are placed vertically OR layout could be just verticall "newspaper view",
• has to somehow work with labels and marking read/unread etc,
• potentially should visually group messages depending on their age like, show group for "Today", "Yesterday", "Older" etc.

Technical:

• Simply base this on "QStyledItemDelegate", draw multiline info about article + first few sentences, see above for HTML delegate.
• Add feature which will automatically save first picture/enclosure of each article, allowing to use this in delegate.
• The listview would have to likely have only 1 column, so re-implement sorting via other ways.

[martinrotter]

This will be addressed by new "magazine view" which will be usable even outside of RSS Guard as kind of "web" GUI. It will have some nice features while being simple at the same time and will even allow to use the web GUI across internet and/or local network, effectivelly allowing to share RSS Guard article with other people.