Co-authored-by: Aditya Sharad <6874315+adityasharad@users.noreply.github.com>

This is for PR #607, 'source-root' input test case.

As this test is using only JS, it's not necessary to compile or analyze the other languages.

…tion into source-root-input

Moving the files into ../action was causing the job to fail because it couldn't find the test directory anymore. According to @adityasharad, these 'mv's should
not be necessary. Removing these means changing the path to the actions.

I'm also removing the 'config-file' input to keep the test minimal. I think this will mean that CodeQL will use the default query suite, so I hope that this doesn't change the results.

The test is not related to packaging.

Co-authored-by: Aditya Sharad <6874315+adityasharad@users.noreply.github.com>

This config file 'ought to have some queries good for testing!

Also, update the options and inputs documentation.

This input allows users to specify which packs to run. It works in
unison with the packs block of the config file and it is similar to
how `queries` works. They both use `+` in the same way.

Note that the `#TODO` in the pr check is still around, but the CLI
is available. I will remove the TODO in the next commit.

The changelog for an empty version will now be:

```
No user facing changes.
```

And this will appear in the final changelog when there is an actual release.
The benefits are that users will see regular release cycles and know
how old versions are even if there's no changes for a particular version

If we find that we are going months without any user facing changes, but
we have non-visible changes, then we can rethink this strategy.
But I think this is nicer than having empty sections for a version.

This can be removed when 2.5.6 is released.

This change ensures that the the script can handle
commits with no committer in them. This will happen
for some commits that are auto-generated during
PRs.

This was causing the workflow to run and create tags after merging
main into a branch.

Also, make the baseline count message less awkward sounding.

Uses two pre-existing packages to run some simple queries on a javascript
database.

gh will complain if there is an empty `""`, which is the case if
`$DRAFT` is unset.