Standardize Product Development Timeline
At the moment, we can find at least three different entries in the handbook that detail the Product Development Timeline:
- https://about.gitlab.com/handbook/engineering/workflow/#product-development-timeline
- https://about.gitlab.com/handbook/product/#important-dates-pms-should-keep-in-mind
- https://about.gitlab.com/handbook/engineering/ux/ux-department-workflow/#product-development-timeline
To keep the handbook DRY, let's clean-up one of the pages to be the SSOT and link the other ones to it. If any relevant information is necessary to a specific persona (for example, information designers need to know around a date/milestone in the timeline), it can be added as support text.