Add "Latest updates" page

[frankharkins]

Adds a latest updates page with some initial content. Closes #1301.

I've prioritised news that requires user action (i.e. deprecations), but open to other ideas too.

Points from a recent meeting:

• We will want product owners to write a release summary for each release - and specify that the url out to the release notes should specify the version (this is mentioned in the Docs overview and publishing processes page)
• Highlight product blogs, product announcements, and latest versions of each API ref release
• Duplicate "what's new in the docs" from the announcements

[frankharkins]

Also worth noting that we already have https://docs.quantum.ibm.com/announcements; maybe we should link out to that from the sidebar and more actively publish news there?

[javabster]

thanks Frank!

I see all these latest updates are hardcoded into the page, can you think of any ways to make this more automated? I like the idea of summarising some of the biggest things that have happened recently with code examples but I think its going to be difficult to maintain. If we cant think of a more automated way to generate this page then I think we should stick with the type of thing you did in the first paragraph - just listing out links of where people can find latest updates.

Some extra things we could link out to:

• product announcements page
• latest Qiskit release blog (this might be something we need to manually update)
• maybe the events page? for news about latest events coming up: https://www.ibm.com/quantum/community#events

Also I think it would be good to split sections out by package - so have a section at the top which is for general updates (e.g. link to product announcements, qiskit blog etc.) then a section of Qiskit SDK (link to release notes and latest release blog), then runtime, then transpiler service, then maybe a community section (with the events link?)

[frankharkins]

Closing as we've decided to link out to the announcements page instead.

[abbycross]

Reopening!

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[javabster]

somethings gone wrong with the italics here?

[javabster]

other than the italics issue this LGTM!

[jyu00]

Some comments but otherwise LGTM.

One suggestion though - what do you think about putting a last updated at the top of the page? So people know if something has changed since their last visit.