Improve docs authoring experience

As a dev, writing docs is made unpleasant by a few things in the process, especially when writing docs for an Operator, because multiple repos are involved.

Currently the workflow is:

• checkout both the docs repo and the operator repo
• edit the playbook file to point to the local operator repo checkout
• write the docs in the operator repo and rebuild the docs periodically

Main pain points are:

• the setup is cumbersome
• build times are long

### Tasks
- [ ] Cache UI bundle in the build
- [ ] investigate Atlas/partial build extension

Links:

• Antora Atlas extension: https://gitlab.com/antora/antora-atlas-extension
• partial build extension: https://github.com/spring-io/antora-extensions#partial-build (depends on the Atlas extension)

Commencez par examiner l’extension Antora Atlas et l’extension de builds partiels liées dans l’issue, puis examinez le workflow actuel de build de la documentation. Définissez l’impact du caching des bundles d’UI et des builds partiels sur la configuration à deux repositories ; le travail sera considéré comme terminé lorsqu’un workflow d’authoring documenté et fonctionnel, avec des temps de build plus courts, sera disponible.