This is now 'bonita-documentation-site'.

Use the non-production navbar:
  - dedicated title and background color
  - no search

The preview bash script now allows to
  - force usage of the production navbar
  - use locally built ui-bundle
The 'title' option has been renamed into 'site-title' for consistency

Previously, there were both bash and npm scripts that rely on several nodejs
script. For simplicity, we only have a single bash script that support all
existing options (with a single nodejs script).

The documentation has been improved
  - introduce `--help` in the bash script to display all available options
  - the README better explains how to generate the preview for both development
  and deployment

Bonus: activate Admonitions with github support in the README

Generate an Antora Playbook from the regular one and change the content sources
configuration.

* Document when we need using local sources git repo

Integrate the BICI migrated content and document how this has been done for reuse with other content (based on previous poc).
The antora-ui bundle has been generated from a previous poc, it will be updated with content of bonitasoft/bonita-documentation-theme later

This also setup
    - build with npm: shared commands and shared dev/build setup
    - antora playbook: more ready for GH pages deployment
    - allow to build the site for local and production usage
    - allow to run local http server for evaluation