The Zephyr CI meltdown

Description

Zephyr Developer Summit recordings are now available!
The Raspberry Pi Debug Probe, usable with Zephyr's CMSIS-DAP sample.
Zephyr Pull Request dashboard for finding PRs that need review.
Twister weekly test results.
Zephyr Discord server (check out #ci and #pr-help channels when you PR is stuck).
GitHub issues labeled "good first issue" for those looking to start contributing.
In-progress pull request for a new RFID subsystem.
Experimental "DT Doctor" tool for troubleshooting device tree errors. Also see documentation page for troubleshooting Devicetree issues.