Add distro resources / handle files correctly in 22-image.raku

[ab5tract]

Some relevant commit messages:

Add GTK::Simple::Image

This requires a few new GDK related subs. I have placed them within
GTK::Simple::Raw instead of GTK::Simple::GDK because otherwise
we would need to import the latter into the former. Since these
new routines are only used by GTK::Simple::Image, it seems fine
to group them in Raw where they are imported via the :image import
set.

and

Add a resource and a way to access it

In order to have a correct example for the new `GTK::Simple::Image`,
we need to use the `%?RESOURCES` of the `GTK::Simple` distribution.

This is exposed via:

  GTK::Simple::Distro::Resources::gtk-simple-resources

This is declared as a term so that once imported,
you can access the returned hash easily:

  gtk-simple-resources<camelia-logo.png>.slurp(:bin, :close)

This will hopefully be useful for users to some degree, but it
is primarily added for examples to access.

[lizmat]

Feels this should somehow be conditional?

[ab5tract]

Fair point.

[finanalyst]

@ab5tract Any idea why the checks are failing?
It seems to have been a pull request on ubuntu that failed. I re-started the test to see if it was just a internet glitch

I think may be we should do the test with a pre-compiled docker image.

[dwarring]

Maybe try an apt update before the apt-get ...?

[finanalyst]

@dwarring I've added sudo apt update step to the github actions

[finanalyst]

@ab5tract I tried re-running the test, but its not using the new work flow file.
Would you add a minor commit to the PR, such as bump the version number. That should trigger a new test run.

[finanalyst]

@ab5tract one of the tests failed [/t/02-export-subs.rakutest]
Is it failing for you locally?

[finanalyst]

@ab5tract The automatic testing fails on t/02-export-subs.rakutest when run with github actions.
I have found that CI testing can sometimes fail even though on my machine the test does not fail.
So I asked earlier whether t/02-... passes locally for you.

[finanalyst]

@ab5tract t/02-export-subs.rakutest is still failing on the CI

[ab5tract]

@finanalyst i am aware. What's the purpose of pinging like this?

[finanalyst]

@ab5tract sorry! I didnt think you had heard me.

[ab5tract]

That's alright. I need to try this on Linux to determine if it actually passes locally or not.

[finanalyst]

@ab5tract I just re-read issue #112 and your response. Is the test failure here due to the same reason as the failures in #112? I haven't analysed the problem yet.

If the failures are independent of the work in this PR, then I can merge this PR, and then we could have a separate PR to handle the example failures

Your thoughts?

[finanalyst]

@ab5tract Fab!

[ab5tract]

This is one time at least that it's very handy that you can pass unused named arguments to methods :)