Macro app_frame::inject

macro_rules! inject {
    (
        $(#[$outer:meta])*
        pub struct $Name:ident {
            $($viz:vis $field:ident: $FieldType:ty),*$(,)?
        }
    ) => { ... };
}

Implement constructors that can be used for dependency injection:

• new method for each field
• impl From<&T> where T: Provide for every field