Insufficient detail about 0.23 breaking changes

Documentation issue

Summary

v0.23 basically breaks any existing Zola user with the tera2 migration. There is no clear changelog or migration guide. There isn't a rollback guide either. (I think I'll have to cargo install with a tag?)

Proposed solution

Include a clearly labeled migration guide on the https://www.getzola.org/documentation/getting-started/overview/ docs site.

And/or for releases with breaking changes, have a migration + release notes like Bevy: https://bevy.org/learn/migration-guides/introduction/ Bevy breaks a lot often, but it's less painful when there is a document explaining what changes are needed and small examples.

Or Django also has excellent release notes https://docs.djangoproject.com/en/6.1/releases/