Add abstract factory image
Add abstract factory image

ianlet/rust-design-patterns,ianlet/rust-design-patterns,beni55/rust-design-patterns,ianlet/rust-design-patterns,jdavis/rust-design-patterns,beni55/rust-design-patterns,beni55/rust-design-patterns,jdavis/rust-design-patterns,jdavis/rust-design-patterns,jdavis/rust-design-patterns