Differentiate actual read item and marked-as-read item

[shizunge]

Separated from #668

Today an article is marked as read when

1. we view it (i.e. from /unread/entry/* or /history/entry/*)
2. use the mark-all-read/mark-page-as-read action.

We want to differentiate these behaviors. Thus we could tell which feed we interact most.
We call the 1st one viewed, the 2nd one marked.

We need:

1. In the "feed" page:
   For each feed, shows three numbers (instead of two): unread count, read count and total count.
   Sort feed by viewed articles. ([Feature Request] sort feeds by last update time #632 )

2. Show only viewed items in the history page.

[darddan]

Please consider adding status type archived to differentiate between the entries that have been read/mark as read and those that have been automatically removed

[shizunge]

Please consider adding status type archived to differentiate between the entries that have been read/mark as read and those that have been automatically removed

@darddan I do not think I got you. Read items can be seen in the history tab. Automatically removed items cannot be seen anywhere. They are already differentiated.

[MaybeThisIsRu]

This fits my use-cases as well. When I'm marking something as read from the API, I'm not really "reading" them so much so getting them out of view. I'd like to be able to differentiate between items I actually read, and those I marked as such from the API/interface.

[shizunge]

Here is the discussion on this topic https://github.com/orgs/miniflux/discussions/1772