feat: add System.arch constant

[liz3]

Add System.arch constant

What's Changed:

Adds a new constant to the System module which provides the process archictecture as a constant, since scripts are platform independent this can be helpful for architecture specific code in

Type of Change:

• Bug fix
• New feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Housekeeping:

• Tests have been updated to reflect the changes done within this PR (if applicable).
• Documentation has been updated to reflect the changes done within this PR (if applicable).

Screenshots (If Applicable):

[Jason2605]

Thanks for this!