Documents the agents plan errors CLI command in both the Command
Synopsis and Command Reference sections of the specification.
The command was already implemented in src/cleveragents/cli/commands/plan.py
and referenced in the TUI slash catalog but was absent from the CLI
documentation sections.
Changes:
- Command Synopsis: added 'agents plan errors <PLAN_ID>' after plan rollback
- Command Reference: added '##### agents plan errors' section with synopsis,
purpose, arguments, and Rich/Plain/JSON output examples
Approved via proposal issue #2883.
ISSUES CLOSED: #2883
freemo