scripts: merge removeAnchors.sh and resetSolutions.sh

[softmoth]

Keeping it all in a single scripts/prepareExercises.sh avoids duplication.

Also remove the complex file finding; simply getting all source files within the exercises directory is a perfect fit for what is needed. This fixes Issue #430.

[milesfrain]

Thanks for the PR.

I can't think of a situation where we need to selectively choose which operation to run, so let's just simplify things further and always do everything. I went ahead and pushed an update to your branch here, and also updated CI to run your new script.

The reason for the original complicated FIND_FILES_PATTERN regex is to not accidentally edit anything in the other directories found within each chapter's directory (e.g. dist, node_modules, output, etc.). But there's another simple way to just point to src and test, so I went ahead with making that edit too.

This runs on Linux for me.
Are there any Windows or Mac folks who can verify this still works for them too?

[softmoth]

That looks great. I think there are some old finds that don't -print by default, that's why I had the parentheses and the explicit -print, but probably it's not needed if it works on OS X and FreeBSD as you've done it. Maybe people on #396 and #443 could help testing, since those are related?