Simplify all issue-tracking documentation to defer to `beans prime`
rather than maintaining a parallel description of beans commands.
- CLAUDE.md: collapse task-tracking section to just `beans prime` callout
- edu/.claude/skills/work: nbd next → beans list --ready
- nbd/.claude/skills/work: nbd next → beans list --ready
- nbd/.claude/skills/triage: nbd tickets/.nbd → beans beans/.beans
- nbd/src/claude_md_snippet.md: replace nbd snippet with beans prime stub
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Elijah Voigt