Very old versions of meson did not include the subdirectory name in the
target name, so we started adding various "top-level" custom targets in
subdirectories. This was nice because the main meson.build file wasn't
as cluttered. But then meson started including the subdir name in the
target name. So let's move the definition to the root so we can have all
targets named uniformly.
This only changes documentation. In various places we call "ninja"
directly. I figured it would be safer to leave those in place for now,
given the meson replacement commands lines appears to be supported in
newer meson versions only.
It turns out Jekyll (the engine behind GitHub Pages) requires that pages
include a "Front Matter" snippet of YAML at the top for proper rendering.
Omitting it will still render the pages, but including it opens up new
possibilities, such as using a {% for %} loop to generate index.md instead of
requiring a separate script.
I'm hoping this will also fix the issue with some of the pages (notably
CODE_OF_CONDUCT.html) not being available under systemd.io
Tested locally by rendering the website with Jekyll. Before this change, the
*.md files were kept unchanged (so not sure how that even works?!), after this
commit, proper *.html files were generated from it.
The GitHub guide on contributing file says: "Decide whether to store your
contributing guidelines in your repository's root, docs, or .github directory."
https://help.github.com/articles/setting-guidelines-for-repository-contributors/#adding-a-contributing-file
But there's really no advantage to keeping it in the hidden .github/, since
these are public and really belong together with the other documentation.
We can still keep the issue templates under .github/, since they are not really
documentation on their own.
Updated the links pointing to CONTRIBUTING.md to refer to the one in docs/.
