Adding perl support and hello world example

[anfelbar]

About

Adding Perl support and hello world example.
Run with bazel run //perl:perl

Progress #36
Context: https://engflow.slack.com/archives/C01CPGQQ87N/p1670255268536419

[anfelbar]

This works on both linux and macos CI. It also works on our remote canary.

I am using git_repository because when using http_archive like this

http_archive(
    name = "rules_perl",
    sha256 = "ccccc14c3e1e627622a7f1600bb33f67076679eff32431b345ed24bce38f8ec6",
    strip_prefix = "rules_perl-0.1.0",
    urls = [
        "https://github.com/bazelbuild/rules_perl/archive/refs/tags/0.1.0.zip",
    ],
)

gives me this cannot load '@rules_cc//cc:toolchain_utils.bzl': no such file. Can we leave git_repository?