Test example scripts

[graeme-a-stewart]

As the examples are distributed with the package, they should be tested.

This means setting up the appropriate project file for them and checking that a representative sample run correctly.

I tried to achieve this as part of #71, but there are a number of problems:

• Actually setting up correctly the examples to run against the code in the PR is quite fiddly
  • It requires bootstrapping the examples' Project.toml and then adding the current version of JetReconstruction as the development version of the package
  • As, in the CI, the checkout is for JetReconstruction.jl this means making a softlink from JetReconstruction to here so that Pkg.develop(path=...) works
  • This is done in https://github.com/JuliaHEP/JetReconstruction.jl/blob/main/test/bootstrap_examples.jl
  • Some sample tests can be run using the standalone example test script https://github.com/JuliaHEP/JetReconstruction.jl/blob/main/test/tests_examples.jl

However, although mechanically this is almost doing the correct thing, in the CI there are some issues:

• The dependencies are heavy and some for GLMakie actually seem to timeout
• As these are CI machines, they can't correctly setup GLMakie

And in addition for the nightly build there seems to be a weird issue with setting up the environment that does not happen in 1.9 and 1.10:

ERROR: LoadError: ArgumentError: Package Pkg does not have Random in its dependencies:
- Note that the following manifests in the load path were resolved with a potentially
  different DEV version of the current version, which may be the cause of the error.
  Try to re-resolve them in the current version, or consider deleting them if that fails:
    /tmp/jl_qr3gn6/Manifest.toml
- You may have a partially installed environment. Try `Pkg.instantiate()`
  to ensure all packages in the environment are installed.
- Or, if you have Pkg checked out for development and have
  added Random as a dependency but haven't updated your primary
  environment's manifest file, try `Pkg.resolve()`.
- Otherwise you may need to report an issue with Pkg

I currently have no insight into that one.

What needs to be done here is:

• Restructure the examples so that the CLI ones can be run in a lighter weight environment, not depending on GLMakie
• Figure out the problem for the current nightly project setup