chore: update Alloy defaults

[m1ga]

Have some better defaults when working with Alloy:

• remove the "metal" part from the readme
• only keep one (useful) TSS class example in the default TSS comment. Most users will remove it right away.
• make var args to const args
• add a Window instead of a View to the default View. This will run when you create a new controller and in my opinion it's more likely that you are creating a Window instead of just a View.
  • it still needs a class otherwise it won't create a TSS file
• remove the color from the widget default. Will always mess with dark mode

[m1ga]

Awesome, thanks for merging it 👍