Using mgnl CLI is mentioned in several places across the documentation. When there are updates/changes to the CLI and its dedicated page, we should update/change these mentions too

This task aims to inventory where we recommend using CLI/instruct users to use CLI and suggesting a strategy to eliminate redundancy and ensure we keep everything up-to-date.

Pages already identified:

• https://documentation.magnolia-cms.com/display/DOCS/Magnolia+CLI
• https://documentation.magnolia-cms.com/display/DOCS/Install+Magnolia
• https://documentation.magnolia-cms.com/display/DOCS/Creating+a+light+module
• https://documentation.magnolia-cms.com/display/NOW/Setting+up+a+Magnolia+bundle+for+local+development
• https://documentation.magnolia-cms.com/display/NOW/Developing+and+testing
• ...