This changes most of the code base to using #pragma once instead
of the old style #ifndef FOO_H header guards. I hear that the
old style is still slightly faster, but I don't care much about
that. I'm sure GCC will continue to optimize for this going
forward.

Also, we're already using a bunch of other C11 features, so
might as well use this too.

As the project has grown, we've let things get a bit out of their
logical place. This does a bit of cleanup and tries to bring some
of the embedded resources closer to where they are used.

But more importantly, this allows us to clean some things up to
the point that we can move forward statically linking a bunch of
the plugins into libide. The plan here is to speed up the initial
loading by avoiding lots of disk I/O stats which are currently
hurting us.

This also unifies into a single ignore function so that we don't have to
duplicate things.

This will be used by the build pipeline to locate staging (where we commit
local files for the build) and where we install files (the repo).

This adds ide_is_flatpak() to simplify our checks to see if we are running
in our bundled environment. Generally we don't want to have to rely on
this, but special cases do exist (such as choosing what terminal to run).

This uses an embedded plugin that will fail to load if we did not link
in support for webkit. Plugins like devhelp and html-preview should rely
on this plugin as a dependency.

This doesn't need to be hard coded in, we can compartmentalize it now.

This script will get us some general information to help us track down
a bug. It is intended to be attached to a bug report.

We probably want to include some runtime logs as well. We will append to
this as we find we need more information.