Added zerofs container build and push workflow

[munishchouhan]

This pr will ad the following:

1. Added Dockerfile
2. Added Makefile
3. Added build-zerofs.yml

[munishchouhan]

@claude review it

[pditommaso]

Temporary changed to cr.seqera.io/public/zerofs instead of public.cr.seqera.io

[munishchouhan]

Temporary changed to cr.seqera.io/public/zerofs instead of public.cr.seqera.io

@seqeralabs/devops can we add cr.seqera.io creds in this repo secret?

[pditommaso]

No need for secret. I'm building locally for testing it

[munishchouhan]

No need for secret. I'm building locally for testing it

zerofs 0.15.5 is released today we can use this https://github.com/Barre/ZeroFS/releases/tag/v0.15.5

[pditommaso]

not hurry