Polish

This PR contains a variety of smaller minor edits that improve the overall UI experience for the end-user.

Ignore the following files: package.json, package-lock.json, yarn.lock they are auto-generated and useful only for module consistency.

This includes:

• Showing the settings modal and info modals in certain screens
• Improving the internal siad launch process by logging to disk
• Remove some old UI code that is no longer being used
• Add dark mode
• Add StyledButton, StyledModal and visual mixed components that allow theming (for dark mode)
• Utilize node-pty for terminal rather than child_spawn (to allow for stdin)
• Add rebuild scripts for electron-builder so the native modules are built for node-pty when packaging app for production