Add start mining section, remove wizard dependency

[pavlenex]

This is proof of concept PR. Not ready to be reviewed or merged yet. Requesting comments.

Our goal is get user to start running software as soon as possible. We don't want user to spend time configuring anything on the website. As our application layer moves towards docker-first approach, we can now get user up and running with a single command line.

This PR:

• Removes sv2-wizard entirely and all custom code around it.
  -Adds new start mining section where we have flexiblity of adding various deployment options (binaries incldued in the future, as we move to single binary to rule them all approach)
• Shows rather than tells with a simple software screenshot (image can be changed, we can have different ones for light/dark mode.
• Adds a subtle pickaxe icon on top as a call to action in the menu (debatable if that's clear or not or just fun)

[netlify]

✅ Deploy Preview for stratumprotocol ready!

Name	Link
🔨 Latest commit	e8b84d7
🔍 Latest deploy log	https://app.netlify.com/projects/stratumprotocol/deploys/6998223b4546b10008e26b64
😎 Deploy Preview	https://deploy-preview-308--stratumprotocol.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.