Option to open clickable cards in new tab

[kasuteru]

Context

For outgoing links, it feels sometimes more intuitive to open a link in a new tab / page instead of the current one. This is for example when our users want to open the actual application from a clickable card while keeping the documentation open.

Proposal

An option :link-newtab: for all clickable cards or just external links, that is by default false (to be backwards compatible) but can be set to true to open link in a new tab. Would look like this:

.. card:: Clickable Card (external) :link: https://example.com :link-newtab: true

The entire card can be clicked to navigate to https://example.com. 

Tasks and updates

Not sure

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