feat: Add ReactFlow `<Controls/>` and link to github

[alexkreidler]

My mouse scroll-wheel is broken on my desktop so I can't zoom in and out of the canvas. If I could use the zoom in and out buttons provided by ReactFlow <Controls/> then I'd be able to.

Also I wanted to give feedback/contribute to the project but the Github link was not readily available in the app itself, so I needed to go through a twitter thread or do a google search.

[transmissions11]

My mouse scroll-wheel is broken on my desktop so I can't zoom in and out of the canvas. If I could use the zoom in and out buttons provided by ReactFlow then I'd be able to.

how do you scroll on websites otherwise haha? but if you want to open a PR to add a Controls element in that's fine with me — we used to have it but removed cuz felt it was cluttering and assumed anyone using the internet had a functional scroll input device

Also I wanted to give feedback/contribute to the project but the Github link was not readily available in the app itself, so I needed to go through a twitter thread or do a google search.

feel free to open a PR to add a github link to the nav bar, tho i think ppl having to click about and then find in the twitter thread is fine too