Alias bare annotate targets in the CLI

[backnotprop]

Summary

• route bare annotatable CLI targets through the existing plannotator annotate path
• preserve reserved top-level commands and internal opencode/copilot bridge commands
• cover shorthand routing, flag preservation, bare invocation, and typo-command behavior

Tests

• tmp_config=$(mktemp /tmp/plannotator-empty-bunfig.XXXXXX); bun --config="$tmp_config" test apps/hook/server/cli.test.ts packages/shared/annotate-args.test.ts packages/shared/review-args.test.ts; exit_code=$?; rm -f "$tmp_config"; exit $exit_code
• git diff --check

Note: the empty Bun config bypasses the repo-wide happy-dom preload because this local workspace is missing @happy-dom/global-registrator.