Adds a preso list page

[iAmWillShepherd]

Fixes #30

Solution

This PR adds a new page where a presenter's presentations can be viewed. Note that this PR only includes changes necessary to view presos, no interactivity is included.

Other changes:

• Added a button to the preso creation page (/preso) to cancel creating a new preso and take you back to your preso list.
• Added button on preso list page to create a new preso.

Testing

This video explains what needs to be done to test this change.

https://user-images.githubusercontent.com/1715082/147287593-a37c27b6-e300-4d53-bf4d-76ac0a482c7a.mp4

[vercel[bot]]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/onesignaldevs/ngosi/6r8DoSo9yirnyC81LcPGuGjmhJwb
✅ Preview: https://ngosi-git-where-are-my-presos-onesignaldevs.vercel.app