Minor changes applied to Nitea

Added

• "Show code" on issues. Open the exact line of your mod's code behind an error, read from your linked GitHub repository and with syntax highlighting. Nitea uses the tag that matches the event's mod version, so yoran. When no tag matches, it uses the default branch and tells you the lines may have moved.
• Every stack frame from your own code now links straight to its line.
• The Nitea Aether page at nitear Windows, macOS and Linux, avideo tour, and Aether's own Terms of Service and Privacy Policy.
• A Nitea Aether link at the top of the home page.

Changed

• The home page now plays a real placeholder.
• "Connect GitHub" now starts by asking GitHub for access, and only sends you to install the Nitea app if it isn't installed on any account yet.
• "Add repositories on GitHub" oositories you add there show upas soon as you come back to Nitea, with no reload needed.

Fixed

• Connecting GitHub when the Nitcould leave you stuck on GitHub's settings page, and your repositories never showed up in Nitea.