Feature request: Allow support of both packr and fs

[Yaska1706]

Description

From v0.8.0 buffalo started using io/fs from the standard library which replaced packr and this limits backward compatibility when upgrading other buffalo versions to the latest version.

It will be convenient to allow both support for packr and fs. Instead of doing a code rewrite which can break the system.

Would love to get feedback if it is a good approach.

[paganotoni]

Hey @Yaska1706. Thanks for sharing the idea. Maintaining 2 ways of embedding files within the Buffalo library would be too much effort for the maintainers. We moved to use the embed package because the Go team is maintaining it and can guarantee the stability of it.

One alternative to support Packr is to write a packer FileSystem. In that case Buffalo would not need to change at all but rather the wrapper interface would allow use Packr Boxes for those applications that cannot move away from Packr.