feat: Add configuration option for default architecture

[Ash258]

• Closes How to configure scoop to default to 32bit architecture? #3770

Configuration name is subject of change. I am following dash notation for naming, until config is reworked and united (Related #3401)

Is boolean enough or it is prefered to go with scoop config 'default-architecture' '32bit|64bit' which could be more suitable for additional arch support (arm for example)

[niheaven]

default-architecture is preferred for me.

[r15ch13]

default-architecture with 32bit|64bit|arm sounds good to me. 👍

[niheaven]

scoop should throw when user use some words other than 32bit or 64bit.

[Ash258]

I could potentially add else branch with ensure_architecture function check

Resulting to:

   if ($null -eq $arch) {
		if .... is64..
   } else {
       $arch = ensure_architecture $arch
   }

or to be more user friendly with something like this

try {
   $arch = ensure_architecture $arch
} catch {
	error 'Invalid default architecture configured'
}

[niheaven]

Prefer try...cache 😄

[niheaven]

LGTM