Add new endpoint for CentOS Stream

[filip-szweda]

Is your feature request related to a problem? Please describe.
CentOS Project offers two platform variants: CentOS and CentOS Stream.
The differences can be found here: https://www.centos.org/cl-vs-cs/
Considering that these two platforms are run in parallel and possess different specifications I think it makes sense to keep them under different endpoints in the API.

Describe the solution you'd like
I would like a new endpoint to be created for CentOS Stream e.g. https://endoflife.date/api/centos-stream.json
Currently, under https://endoflife.date/api/centos.json there is one two CentOS Stream that would have to be moved out i.e. stream-8 stream-8 and 9.

[marcwrobel]

I also think this makes sense, and splitting the page would make things simpler/clearer for users. This subject may have been discussed when the first stream release has been added to the page (#290), but unfortunately I cannot find any trace of that discussion.

Any opinion on this subject @endoflife-date/everyone ?

[captn3m0]

+1 to splitting. I've also noticed other issues with centos being too similar to centos-stream, such as using identical CPEs (between centos8 and centos-stream-8), and this would clarify the difference more easily.

[filip-szweda]

I have created a pull request for this issue #2958