[Feature] Export image to share

[Taks07]

Please ensure the following for feature requests

• I checked to ensure there aren't other open Pull Requests for the same update/change.

Is your feature request related to a problem? Please describe.

Its currentlyhard to let friends know about my progress, requiring screenshots

Describe the solution you'd like

An export button that creates an image containing info about my workouts and progress that can then be shared on social media

Include a user story to describe why you want this feature

As a user, I want to be able to share a summary image, so that I can brag to friends about my progress