Add mdbook preprocessor to rewrite template links

[cb341]

Previously file links in the mdbook docs would simply download the file. This can be annoying because it takes an extra step to get to the source code of the file if it needs to be opened first.

My proposal is to simply rewrite the file links such that they point onto our GitHub instead.

BEFORE

CleanShot.2026-05-20.at.11.12.49.mp4

AFTER

CleanShot.2026-05-20.at.11.11.25.mp4

[cb341]

This file didn't exist for some reason despite being referenced int he docs

[hunchr]

Is this still needed? Rails has /up.

[cb341]

that's fair..
but then we need a different boilerplate setup for the initial cucumber test.

https://open-source.renuo.ch/application-setup-guide/ruby_on_rails/cucumber.html?highlight=cucum#cucumber

[hunchr]

Good point, but

If you add Cucumber to an existing project, test a real page instead of using the given example test.

I'm assuming there is already at least one controller. Otherwise, adding Cucumber before being able to test anything doesn't make sense.

[hunchr]

I have no idea what this is about. Please assign someone who knows the ASG.

[hunchr]

Why don't we just link to GH directly?

[cb341]

Why don't we just link to GH directly?

That works poorly when you want to use the docs in an offline environment.
With relative paths you can still navigate files.