Added a devlog repos command that scans all tracked repositories and displays a summary table of their devlog status — showing the last version, date, and how many unversioned days remain. Handy for quickly seeing which repos have pending devlog entries.

Moved the devlog skip days configuration out of each individual repo’s assist.yml and into the blog repo’s config instead. Skip days are now keyed by repo name in a single central location, which keeps per-repo configs cleaner and makes the skip list easier to manage. Updated devlog skip, devlog list, and devlog next to read from the new location.