Announcement of Oban Web Open Sourcing and v2.19 Release

The announcement covers the open-sourcing of Oban Web, previously a private tool now made available for all Oban users on Hex. This change comes alongside the release of Oban v2.19, which introduces various new features such as support for MySQL with the Dolphin engine, simplified installation through a new mix task, and improved logging capabilities. Additionally, it details the changes and enhancements in Oban Web v2.11, including features for managing multiple Oban instances and improved dashboard functionality. The new Oban Met tool, essential for the telemetry and metrics in the dashboard, is also open-sourced. The announcement concludes with a note on subscription changes for the Oban services and expresses gratitude to the community.