Standard template for Show-n-tell under Discussion

[ajeetraina]

As we will be starting with Show-n-tell sessions, it will be good to have a standard template that new speaker can fill out to enter their details like topic, region, availability etc.

Reference: https://github.com/docker/get-involved/discussions/categories/show-and-tell

[ajeetraina]

Created Typeform for Speakers and added it to https://contribute.docker.com/docs/communityleaders/resources/speakers/