Add Github icon link on top of demo.tutorialkit.dev `TopBar`

[AriPerkkio]

Is your feature request related to a problem?

The demo page https://demo.tutorialkit.dev doesn't have link to TutorialKit's sources.

Describe the solution you'd like.

Similar solution as done in AriPerkkio/tutorial-vite-plugin#7.

Apply it here: https://github.com/stackblitz/tutorialkit/tree/main/docs/tutorialkit.dev

[Charan167]

Hello! I wanna work on this issue. Please let me know what exactly do you mean by TutorialKit's sources.

[AriPerkkio]

what exactly do you mean by TutorialKit's sources.

That there should be a link that points to https://github.com/stackblitz/tutorialkit/tree/main/docs/demo.